mazda b2600i problem

a brief description on all major problems and if you have one just ask
#B2600i #WorldScienceTv #4x4 repair

[@seandeterman2499]

Excellent information! Thank you for your knowledge on these trucks! I just bought a 93 2wd and it has been great so far besides a leaking fuel filler neck and a good bit of HLA chatter. Hopefully I get these fixed soon! Thanks again!

[@Joey-yj5ry]

Just bought one of these today and this video is amazing. So many good tips on where to start with this old beast. Thank you for sharing!

[@ashmaass1090]

I'm buying the one I looked at today after watching this video, this guy is great!

[@projectf025]

God damn man what don’t you know about this truck, thank you for being thorough I just bought a 90 b2600i and I don’t know anything about this motor. I’m only familiar with the b2200. Again thank you

[@beechfox3423]

Wish someone would make a video like this for every vehicle. Thanks a ton for a good clear explanation of everything.

[@WorldScienceTV]

Ask any question and I will give the best educated answer I can.

[@slingshot7635]

Thanks for packing so much useful information in one video! Very well done!

[@Smitty19966]

Thanks mate. We have these down under as right hand drives. Some of your tips have helped me out. Cheers! 🍻

[@rcmentalhealthinitiative9444]

Thanks so much I was about to give up on my 1999 ford courier cold start was doing my head in I had the front plugs on the manifold mixed up you are a legend

[@shiftwrenchrepeat]

as someone who is a diehard mazda b2600i 4x4 guy this is awesome info, and all issues ive experienced, overall bulletproof trucks! keep it up man i just put up a few videos on my channel!

[@WorldScienceTV]

Thanks I'll check it out

[@PistonShack]

Thanks for the video. I just got one of them broken. Dealing with engine bog down when accelerating. Useful information.

[@WorldScienceTV]

i do have ecu's

[@PistonShack]

@@WorldScienceTV thanks for letting us know. I will keep it in mind.

[@kcjengr]

Absolutely love my '92 B2600i. We have put over 250,000 miles on it, with hardly any issues. Still has the original clutch. It has been driven across the country and hauled items well in excess of it's capacity with out hesitation. Everything from a 2,200lbm Bridgeport milling machine, to pallets of bricks, and towed stump grinders, ditch witches and utility trailers. Wish they still made small but tough trucks like these.

[@danielsvision]

I love there is still an underground bunch of enthusiasts for the bravo I have a 02' 2.6 dualcab 4x4 that has 420000kms on it and going strong. I love it, it has personality no one understands.

[@manglermalachi8080]

Fantastic information. I've subscribed! Love the dog in the upper RH corner at 2:05

[@A.R.77]

I really enjoyed my 91' b2600i reg cab. Took it to Germany too. Brand new on the autobahn. Being very light with the bigger 4x4 engine, I was able to hold 115 miles an hour, all day. Germans loved the look of the thing.

[@i-love-comountains3850]

I probably need to rebuild or replace the engine on my '90 B2600i 4x4, it was a "turdkicker" for the last two owners so they didn't care how hard they ran it. The chassis seems good and I finally got everything in the front and rear end fixed...then my caty was stolen, and I have to have an expensive one where I live. The engine has well over 200K, doesn't leak but it burns oil significantly, more than 2 quarts between changes. If I can't find a replacement on JDM market, I might look into a K24 swap😅

[@jimkirk41]

great video. your knowledge of this engine is amazing. i learned more than reading an entire haynes manual. came looking after my ac failed to work. pwr to relay and one side of clutch contact. clutch and compressor confirmed good. ac switch on dash lights up. suspect gnd problem at ecu. new relay did not fix problem. thanks for posting a great video

[@WorldScienceTV]

If the ac is not charged then it won’t turn on so sometimes I pull the cover off the relay and press the connection together if the ac clutch doesn’t engage then there is a power related issue

[@jimkirk41]

as expected aftet opening the ecm i found a burned capacitor and a reisistor preventing completing the ac relay circuit to ground. new computer best price is 210 from rock auto. will attempt component level repair on ecm board . thanks again!

[@WorldScienceTV]

The ac is isolated from the ecu the damage to the ecu is in the injection control circuit

[@jimkirk41]

i have no drivability issues from the burnt capacitor that i notice. is the typical issue that starts occuring with this burnt capacitor an injector issue will eventually develop? i m asuming the path to back to the ecm on a typical wiring diagram is just a signal to the ecm to increase injector pulsewidth to increase idle speed?

[@WorldScienceTV]

Yes the issue is injection pulse when the issue shows up most of the time it’s like a flooding carb syndrome. There is a moisture barrier on the board that has to be stripped off before you can start fixing the contacts and a lot of times you have to pull the resistors and diode‘s and smaller capacitors off and clean underneath them and then re-solder them down. I have a separate video on this not the best but it shows the process. I have bin able to fix all but one and I will be able to fix that one eventually one I find a transistor.

[@raymondmartinez8942]

My uncle bought a 89 Mazda b2600 new off the showroom floor very good truck he gave it to me i loved it 👍 👍

[@MrDangadave]

Legend I've just bought one of these and this is fantastic

[@MrDangadave]

A 1997 duel cab 4x4 with 55k on the clock!!!!! One owner and has been sat for 15 years. If you have any advice, I am all ears. Thanks again.

[@user-ic8nr1ht7x]

Thanks for all the info, our problem is when it rains the truck will die when driving through a large puddle , eventually it starts back up within a minute or two running roughly and the a few more minutes it may clear out.

[@davidborg9597]

I have picked up a B2600 4 wd ute for my farm. The seller said it was sitting there for 2 years and was was great then but now its running rough. I am getting raw fuel running right through the exhaust system. Goog compression 180 on each cylinder. Clean oil no water in it. No bubbles or air pressure in the radiator. Runs on all 4 cylinders. Have pulled out the fuel rail and injectors and have applied 12 volts to each and they switch on and off and have blown air through them. When no power onto them they seal fine. I put the injectors back in and it starts and still runs rough and fuel coming out of the exhaust. If I pull the spark plugs out and crank the engine I get excessive fuel pumping out mainly on one cylinder but Ive tested the injectors seal. Have 12 volts positive at each injector when the key is on. Second terminal is not to ground there is a resistance there and equal with all 4 plugs. Being a farm ute the exhaust has been cut off behind the cab after the CC ( not sure if the exhaust sensor is still connected). Also key barrel is damaged and it started with a screwdriver into the plug that is of the back of the old switch. When I rev the engine it runs smoother but lots of white smoke. Any help appreciated.

[@420gzuz]

excellent video. unfortunately the aftermarket head with the improved casting is harder to find now and doubled in price. i bought a fixer upper and learned this the hard way. your info will help me get everything on the truck back into working order, i hope!

[@WorldScienceTV]

Look to Australia for your parts like (eBay.AU).

[@WorldScienceTV]

I have the last set of new locking hubs left in the United States for this truck.

[@julianalderson3938]

Had seals go all of em so new heaf casket. Since then has been great

[@griffenbaker7412]

Thank you for the info! 90 b2600i burning a lot of oil I think valve seals are leaking.

[@WorldScienceTV]

The B2600i is one of the few engines that sprays oil underneath the pistons at all times through pressure nozzles coming off of the oil delivery rail and when the ring and cylinder start wearing down an over abundance of oil starts making it past the piston rings and then not changing oil adequately in the B2600I motor the G6 engine code The carbon and contaminants in the oil start causing over excessive wear the cylinders the only fix for this unless you do have bad valve guide seals which it only smoke on start up and minorly smoke on running conditions is to bore the block and or re sleeve the block with new cylinders of harder metal

[@griffenbaker7412]

@@WorldScienceTV Thank you for your response, it was very informative. I will be sure to compression test the rings.

[@fresnocruisenight6137]

Bought this truck with a blown head gasket and had it replaced, it's been very reliable throughout the ten years I've owned it, but it's been getting hot lately and I've replaced radiator, and cap and water pump and hoses and thermostat and also fan clutch with new coolant and after running for 15 minutes it starts climbing to high temp again, prior to replacing all parts it never over heated it just got close to the H but I immediately turned it off, it's only got to the H twice and one time it blew the old top radiator hose off. Any suggestions would greatly be appreciated also how do you get air pockets out the engine after replacing all coolant parts. Your video is very educational and very well explained.

[@mejestic09]

great info

[@WorldScienceTV]

I will help answer any questions thanks

[@reidwhittington6501]

I have a 1992 mazda b2600i with a 5 speed manual. I was working in it and left the radio on ended up killing the batter. I got it jumped and started a few times ended up accidentally leaving a light in the cab on and killing it again, got it started by push starting it. Didnt touch it for a week and it wouldnt start just got that click sounds from the starter. I got a new battery, batter cables, and starter and it still does that same click... any ideas? Itd be greatly appreciated, thank you.

[@ivakcooper7896]

Thank you for all your videos and knowledge you have shared. Much appreciated. I have a question on idle issues. I replaced head gasket and now when warming up the engine idles at 1,500 rpm then after a few minutes it goes to 1,800 for a while then back down to 800. It will idle at 800 at a stop sign 1 mile from home. The next time I stop is about 4 more miles, and then it idles at 1,500 for the rest of the time I am going. Some times the idle surges up and down, but most of the time it stays at 1,500 rpm. I have 3, B2600i 4x4's and a B2600i 2x2 I bought brand new in '92 and am still driving it with 348,000 mile on it. I swapped the MAF, and the water temp sensor out and no change. What are your suggestions? Thanks for the help.

[@CDX825]

Having a new issue with my B2600 lately. when I first start it I have what seems like a misfire. The engine seems like its only running on half the cylinders. After about a minute or two it goes away and it runs just fine. I have recently replaced the spark plugs, wires cap and rotor. Changed the valve lash adjusters last year. Check engine light is not on either.

[@WorldScienceTV]

I have experience this issue many times with this vehicle and I think it is a bad valve lash adjuster or a flat spot in the cam that allows the valve to be held open while starting up once the valve lash adjuster relieve some oil in the valve shuts fully and the engine idols correctly. I actually have this issue on one of my trucks right now and it only came after replacing all the valve lash adjusters and they’re all brand new and that means one of the new valve lash adjusters is bad

[@jacklucking691]

Have a 1993 Cab Plus B-2600 with 70k miles. Bought it new and the only time it has gotten wet is when I have washed it. Stored in heated garage......should be in the Mazda Museum. I was a Mazda dealer for 25 years.

[@donovan4009]

I have a 89 b2600. When it’s cold it struggles to start an when it starts it doesn’t hold its revs and shuts down after a few seconds. The only way to keep it running when it cold is to play with the gas pedal. But even that sometimes doesn’t work as a keep giving it gas and the car ends up shutting down even at 70-80% throttle. When the car is warm though and has been running for 10-15 minutes it fires right up and works fine. What do you think causes this issue?? Can it be the sensor you mentioned at the begging of the video?

[@YouTubeHarringtons]

This was fantastic; what a resource! Thanks! I'm looking for an 86-93 Mazda B-series truck but was told to steer clear of the 2600 and 2600i for all the ground wire, ECU, EFI, electric fuel pump issues, and that I'd have a much easier time working on and finding parts for the carbureted 2200 and 2000 models. Would you agree? Your video has given me a glimmer of hope for the 2600's again.

[@WorldScienceTV]

Almost all the normal problems you run into our with the ECU

[@YouTubeHarringtons]

@@WorldScienceTV so I shouldn't fear?

[@johnbryan2414]

I checked all the spark plugs they are all firing properly also new wires when I put those plugs in and I fixed the mass air flow screen issue, changed air filter. Is there a way to check if the ignition coil is bad?

[@andrewgomez6528]

I having trouble trying to fix my speedometer. When I’m driving my speedometer moves back and forth. An example is I’m going 50 it says I’m going 70-80 and moves to 70 to 80 back to 75. I replaced the cable that’s connected to the transmission and the cluster but it does the same thing. What do I do and how do I fix it?

[@ivorb]

I have a 1990 b2600i that is stalling a lot, especially when the engine is warm or weather is warm. Any suggestions?

[@CDX825]

Having cold start issues with my B2600i lately. Tried changing the coolant temperature sensor with no change in behavior. Truck starts fine once its warm. I have spark and fuel pressure. Timing is right where it needs to be. Runs good once started.

[@WorldScienceTV]

The coolant temp sender and the air temp sender have the same plug make sure they're not crossed check the wire plug to the sender and the main harness plug to the fuel injectors that is all clear then the IAC needs to be checked

[@yovtec1]

I missed the part on how to pull code for ABS system? How to do!? Thanks so much!!!

[@codytiger4]

I have a '92 B2600i 4x4, automatic transmission. I have had some ongoing issues with the transmission, but haven't been able to find anybody with an automatic transmission to question. When putting the transmission into drive, it seems as if it's not fully sinking into gear or hung between neutral and drive causing either one of two things: it will eventually catch and go into gear, or will just shutter and stall out. It even does the same thing when I try to place it into a lower gear. If it does go into gear initially and then I make it to the next stop sign/red light, the transmission will begin to slip when taking off. However, when shifting into reverse everything is fine. I have questioned multiple people and some seem to believe it could have to do with the torque converter. I understand it's hard to pin point the exact issue, just trying to check and see if anybody has experienced something similar.

[@WorldScienceTV]

If you have any thing more than a bad solenoid then that trans is not worth the money to fix I kepped a couple of these going for years after making this video the trans went out agin. 4th auto in this truck I found a manual truck with a bad engine and body and swapped every thing over. You got a clutch pack out or a valve body problem.

[@aarongallagher8898]

I have owned a b2600i since 2013. My fan clutch went out caused it to over heat and warp the head and blow a pin sized hole in head gasket. Symptoms included temp. gauge creeping up. Warped head/tiny hole in head gasket symptoms included shuttering first 5 seconds after starting engine after driving into town = radiator fluid getting sucked into intake and interfering with plugs spark then shuttering stopped as radiator fluid evaporated. My crank angle sensor went out twice. (no crank angle signal = no injector pulse I suspect the LED's in the optic switch malfunctioned or got dirty with oil. I also had the ECU capacitor issue/IAC problem/ and oil leak past the bolt that holds on the harmonic balancer.(Turned out I had to put sealant on the washer side of the bolt and then the oil stopped leaking. I also had the hydraulic lifter issue. I first tried cleaning the 12 grape sized lifters= did not stop taping. So I bought 12 on ebay and replaced them all = tapping went away.

[@wrencharoundandfindout8780]

Aaron Gallagher thanks for bring up the clutch fan thing mines bad

[@WorldScienceTV]

thanks for the addition as well i have had one go out.

[@wendy_dab1096]

How do you set up the timing on the 2600i

[@Tobeast101]

Mines having an intermittent fault where I’ll go to accelerate and it just Boggs out almost and has no accel, I’m loosing my mind I can’t find what’s causing it

[@michaelpreston2392]

Ok. So you said if your ECM goes out you will still have spark. Can you explain in detail how that is. Please I’m having issues getting spark with my truck. From everything I’ve seen the Hall effect in the distributor sends signal to ECM then ECM determines when to fire and sends signal to the igniter Wich intern drops the ground to the coil causing spark. Correct?

[@mzonduli1663]

Hi. Your video is very informative, I hoped that maybe my problem would be covered. I have a 2001 b2600i 4x4, when the engine is hot, it does not want to go beyond 1500rpm, when it gets there it limits and drops revs back down to build up again, I did put it on a computer and it said the Mass air flow meter is faulty, I bought a new one and it is still doing the same thing, I have also replaced the ignition module, the problem still persists, this only happens when the engine is hot, but when it's cold it revs and runs smoothly. Please assist with any heads-up.

[@douglockwood8480]

Hello. You often advise to start with "check the computer". How can we do that? Is it a check that can be done while the computer is in the truck? Or are you recommending a visual inspection, and/or sending it out to someone with testing equipment? Thanks, Doug

[@WorldScienceTV]

The best way to check it is to actually replace it

[@adal006]

I have problem with ignition coil. How tests my coil ?

[@zippityzbrake]

I think my shift knuckle guide pin came out. That's what I've been told anyway, pin with a spring on it floating around when I took the shifter out. Wondering how to re assemble

[@WorldScienceTV]

You need to tell me what the problem is because I don’t know what your problem is you told me what somebody told you your answer is?

[@johnlarsen4455]

i have been having problms buying spark plug wires for this truck the wires that i have bought have all been too long are there similiar cars that have the same size plug wires

[@WorldScienceTV]

here looks to be some hubs ebay.us/fF62L6?cmpnId=5338273189

[@mickfares]

what injectors would you recommend putting in it? also, im getting about 350km from a full tank and I've change the fuel filter and the fuel pressure regulator but no success. I want to change the injectors anyways since they've got rust on them but do you thing that a fresh set or injectors will fix it?

[@WorldScienceTV]

Only if they are leaking get a used set of original injectors and have them cleaned and inspected the aftermarket ones are junk. 89-90 have the white yellow injectors and 91-93 have the red they are different

[@JoseDiaz-tl4im]

Hello, My problem is with my 1991 mazda B2600i. It is that when I turn it on in the morning, it starts failing and I have to disconnect the plug mitter or the max sensor, wait for it to warm up and then connect everything again. Although it works well for me, it is consuming a lot of gasoline and burning it Raw. There is a lot of black smoke from the muffler exhaust. I will appreciate any recommendation. Thanks

[@WorldScienceTV]

You can find me on Facebook, twitter and Instagram @WorldScienceTV

[@claytonwright7858]

I’ve got a 1990 5 speed 2600i starts idles fine bogs down when I try to give it gas will not take gas. Changed computer just done new head with new gaskets new head bolts new intake gaskets new exhuast gaskets cleaned maf. Truck is running very rich as well

[@zaz4667]

I got my ECM fixed! My truck use to die and not start every once in awhile. I sent it to a guy in Florida that rebuilds them. It was 100 dollars. I have since learned how to recap a computer boards. If you know how to solder you can fix it.

[@WorldScienceTV]

That's pretty awesome you do have to repair the traces in the board that get burnt so you can watch me do a little bit of it in a video of me repairing one of the computers in my B 2600 playlist there on my channel

[@SkorpyoTFC]

Since you seem to know quite a bit, and I can't find any information for it anywhere else, I'll ask you: I have an issue where, when I press the clutch and let the engine go back down to idle from about 2000+ RPM, it chugs into low revs before kicking back up to normal idle speed. It never stalls, but it's very annoying in stop-and-go driving. Any ideas?

[@WorldScienceTV]

Computer is compensating for a air flow Miss calculation so aether an air leek check vacuum storage box on top of valve cover there's an oring that hardens there. Then check the throttle position sensor (tps) . But first open your computer and see if it has bin damaged by the compactors. There are a lot of things that can cause this the brake booster can be bad and leek vacuum.

[@WorldScienceTV]

Do you hear any hissing around the engine. Grab a can of starting fluid and spray it sparingly around each air flow connection and see if you hear the engine reeve up or down looking for leeks. And I'm assuming you have done the basic tune up by this point and checked timing and established a base line.

[@idrewapicture83]

Hi man. I have a 96 ford courier (Australian) , it has the g6 engine in it. I have a issue, it runs rough on start up and takes it quite sometime of idling before it runs correctly. Also the radiator seems to get pretty hot relatively fast. Im struggling to find info on these engines. Do u have any idea what could be going on. Any help will be greatly appreciated. Thankyou

[@WorldScienceTV]

Does the engine tick while it runs rough and then goes a way. This engine has valve lash adjusters it doesn't open the valve all the way when there not pumped up. Are you getting any codes

[@costelmilea6857]

Hey mate I’ve gotten myself a 2003 b2600 manual Mazda bravo and I’m having trouble when coming to a stop the engine switches off (like I’ve turned the key back) I instantly can start it back up again without any problems. Please help? My ignition barrel is new, I’ve cleaned the mass air flow sensor and throttle body and I have checked for vacuum leaks. All seem to be ok. Apart from it turning off when the rpm drops it runs well.

[@demondspn]

i have a b2600 i that just shuts off while drive runs otherwise perfect no codes i also notice the tach works then it down any ideas

[@julianalderson3938]

Thanx

[@Channel505]

Hello I was wondering if you know I'm looking for a drive shaft flange would ypu know where I could find it, I've looked everywhere and no luck, thanks for your help

[@kurtmatthews4422]

Do you know the tps voltage to calibrate the tps??

[@laboyda]

Where have you found cylinder heads for 3-400 at? In not seeing aftermarket options anywhere and am dealing with one that's flowing straight out the tail pipe with engine off

[@WorldScienceTV]

www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=B2600i+cylinder+head&_sacat=0

[@laboyda]

Excellent idk why that wasnt coming up in my googling thank you

[@brownsider4450]

I got a question. I got a problem with my 93. I got a lil video of what it does to me. Feels like it wants to start bogging out on me and my rpm start fluctuating up and down. Once in awhile it turns off on me. I’ve fixed vacuum leaks fuel pump filter and catalytic converter. Ever have any problem like that

[@WorldScienceTV]

Sounds like a bad ground or bad plug in the wiring harness has anybody smashed a test probe or multimeter leads into any of the plugs those bend back the pins and they stop touching

[@douglockwood8480]

Hi there. My '91 b2600i was running great, but became hard starting, then began losing power when accelerating, and now cranks but will not start. When the key is in the "on" position, I do not hear the fuel pump. Suspecting a fuel issue, I tried spraying starter fluid in the intake and the engine starts up fine. So I figure it's either the fuel pump, or the fuel pump relay, or possibly the ECU isn't telling the fuel pump relay to send power to the pump. I've pulled the relay and when the key is "on", I have 12 volts at the black with white stripe wire in the relay connector. Does this mean the relay is bad, or could it be the ECU? Also, I'd like to jump the pump itself to verify it is OK, how do I do that? Thanks, much appreciated!

[@Mo_Money84]

Any luck? I wish someone would have answered your question.. this sounds a lot like my truck. I have a 93’ B2600i

[@TaylorVartanian]

thanks for your video. very informative. i have a two wheel drive 1991 b2600i. during normal driving, the check engine light will go on and the truck feels like it is misfiring. i have also been told by a mechanic that i have low compression on cylinder 3. what i am wondering about is if low compression will cause an intermittent check engine light. i have smog coming soon and i am in a bind.

[@WorldScienceTV]

You'll need to run the codes first to see if it identifies an ignition coil, pick up, igniter, low compression can cause a misfire if the spark plug is getting fouled by oil

[@martind6777]

coolant temp sensor.. my nemesis.. i just finished an engine swap in my '96 2wd due to coolant in oil. the swap went fine but it was running rough as guts. I overlooked the possibility of a crook temp sensor and pulled all sorts of things apart before the light bulb went off upstairs, swapped out the sensor and all was good. I had a very high idle, cold start was fine but after that no go at all. But if in a loosen and turn the dizzy fully forward and it will start. Also could not set timing, it was all over the place. It is quite unique to say that a bad temp sensor caused this myriad of symptoms. The aussie models don't seem to have those green plug end test wires, or that other 3 port behind your headlight. do you have a black diagnostics box to one side of your engine bay? Hope to more of your vids!

[@WorldScienceTV]

ours stop at 93 before obd2

[@WorldScienceTV]

I would really like to get my hands on a full wireing harness and computer from the 96 so I can have better injection mapping and a obd2 diegetic port. The production of this truck stopped in the USA in 93 other county's still produced this truck for many more years like Australia.

[@martind6777]

Well the harness from the engine donor car is still there complete with only the headlight plugs removed and the computer is of no use to me..out of an '02 model.. Are u wanting just the engine bay harness or complete with dash and to rear end.?

[@WorldScienceTV]

I would need every thing to make that harness work that is different than my US model il have to do some research and find out what was changed

[@martind6777]

engine donor was an '02, dash clusters are totally different, elec speed sensor, digital mileage and trip meter, p/s, a/c.. you could splice it in but ... bugga that.

[@francorognone1634]

hello, how do you connect the oxygen sensor in a mazda b2600? do you have one?

[@drewkeil1381]

I was wondering if you have ever had a problem with the 4x4. My front differential will engage and stay engaged unless I unhook the vacuum line at the solenoid. I have to manually move the actuator back to disengage the front differential.

[@WorldScienceTV]

The switch on the transfer case is bad or the pin under the switch fell out. There's two or three switches on the transfer case and there are two different types closed and open

[@WorldScienceTV]

And don't forget you have to push the button on the dash every time you want to disengage the 4x4

[@drewkeil1381]

@@WorldScienceTV I will look into find some of this switches. Thanks you for the information.

[@manuelcontrerasiii6702]

hello i trying figure out why everytime i fill gas into b2600 make it shake almost die but keep it running like few min stop when drive and stop it act again till fuel to 1/4 it more smooth than full gas tank...

[@jayheyliger2736]

Hey its me again how do i replace the pull up lock?

[@epdtr2684]

My B2600i automatic was retrofitted by a trans shop with a manual turn a knob to select gear thereby by-passing the computer. The 1st position would start from a stop in 1st and shift automatically to 2nd originally, then intermittently would not start in 1st, and now only starts from a stop in 2nd. I read somewhere online that 1st gear is vacuum or pressure actuated?? Can you steer me where to look to repair 1st gear actuation? The selector adjustment on the side of the transmission looks correct and tight. Any ideas? Thanks

[@WorldScienceTV]

I will need some pictures of the modified system go to my Facebook or Instagram and we will try to correct this

[@WorldScienceTV]

Your transmission will never work right and will blow the clutch, shims and friction plates out of it sounds like the tranny shop didn't know what they where doing. This is a electric controls transmission. I had to save a guys truck from AMCO once because there databases did not show the transmission computer and was wanting to replace the engine computer. When it was a bad wire plug going into the transmission.

[@dougpeterson5257]

Thanks for the information. I was looking for info about starter relay location and ran across you. 284,000 on mine and still going. However on my 4th clutch slave cylinder and it's acting up.

[@WorldScienceTV]

The only reason you would be going through a slave cylinder that much is because of debris dirt or contamination either in the brake lines themselves or master cylinder for the clutch or from external dirt driveway Road conditions is there a lot of salt sprayed on the roads around you

[@dougpeterson5257]

Thanks, I did replace the master cylinder last time. BUt must confess that I may have been in a hurry to get it installed the times that I changed them.

[@WorldScienceTV]

If you change them in the cold the seals won’t break in properly

[@dougpeterson5257]

The one that's in there now was changed in cool weather say in the 40`s but went down to the 20`s shortly after the installation. The others were put in in the summer, one on the day I was going camping in July.

[@WorldScienceTV]

I have only ever had to replace one so somethings different in your environment making them go out are they leaking or sticking

[@allencummings6285]

So I've been driving one a 92 for about two years now.. few months ago I was idling in the driveway after work about 2 month ago waiting on my mother in-law to mover her car so I can park and it suddenly spitters and dies.. I cranked it back up and it has a rough idle.. Ever since then.. when I first crank it it cranks automatically with ZERO issues.. could be 10 mins could be 30 mins it'll develop a rough idle and wants to bog spit and sputter at take off under 2grand. But at highway speeds it runs fine.

[@julianalderson3938]

Not sure if same mines 2.6 mazda ford. Heard mitssi motor. But i love ir.

[@cameron9122]

Is the remove free wheel switch suppose to be showing that it's on everytime you start the truck up?

[@WorldScienceTV]

Only in four-wheel-drive once in four-wheel-drive the light comes on once you take it out of four-wheel-drive you have to push the button to release the free wheel. If the light stays on this means either you’ve lost vacuum to your front axle free wheel engagement or you have a bad transfer case switch and or a little half-inch chunk of metal underneath each one of the switches that falls out when nobody’s looking about two minutes after you pull the switch out it slides out hits the ground you put the switch back in you wonder why it’s broken

[@Leo-dw3fr]

I just bought a 1993 b2600i.. it doesn't have the leads to check for codes? Precious owner snipped them off.. where can I find them and what exactly are they called so I can begin my search?? Thanks again.. awsome video. 👍👍✌️

[@cri5uuuli]

Hello. Do you know what possibly is wrong when te engine only works at cyl 1 and 3? The comp is equal on every cylinder, spark plugs, rotor and distributor cap is replaced. Injectors replaced. Spark is coming to all cylinders when tested. Cyl 2 and 4 spark plugs are really wet of gas. Can it be the ECU?

[@WorldScienceTV]

It is 98% ecu pull pass kick panel pull ecu and open it if there is still a red and black capacitor in there that says rubacon and there is any discoloration or corrosion 99% problem

[@aarongallagher8898]

noid light on injectors electrical connections to determine if power and or ground getting to injectors. Or look up on internet how to hear the injectors ticking using a long screw driver sounds like ECU though

[@cameron9122]

Is it common for the fuel gauge to indicate being empty at only about half a tank of fuel? I'm wondering if there is a part that is most likely the issue.

[@WorldScienceTV]

The fuel gauge sending unit is the part. Or a wiring problem or the dash gauge

[@tellitallnow3914]

Dont know if you can help but i am now having an issue where when i start the truck when it gets blow say 60 degrees and below, the engine will high rev about 2000-2500 rpm until the engine starts to warm up. Sounds terrible like you wanna take your foot ofc the throttle and As the engine slowly warms , the idle slowly cones down to normal rpm once the engine has warmed up and then runs fine. I would think iff it was a vaccuum leak it would give more symptoms then high rev on cold start in cold temperature. If its above 60 it might start and choke alittle, maybe 1500 at tops but only for a couple seconds. Thanks for any help.

[@WorldScienceTV]

First off yes check for vacuum leaks before anything take a can of starting fluid or brake clean or something flammable has to be flammable and spray around the seams throttlebody gasket Plenum gasket intake manifold if the engine changes RPMs drastically then you found your problem usually there will be some kind of air sound Hiss. If it passes through all that then change your coolant temperature sensor. This isn’t a bad thing if it doesn’t fix the problem either the coolant temperature Sanders on these vehicles should be changed every 5 to 7 years anyways they lose their value and condensation buildup in them causes corrosion. After this or before this the throttlebody will need to be pulled off and serviced the IAC Servo may be a fault may need to just need cleaning. You will have to use vicegrips to break the screws loose before trying with the screwdriver or else you’ll strip them out. Know if you replace the throttlebody they are different from year to year I think only 92 and 93 were the same manual transmission and automatic transmission were also different. You will have to make a new gasket out of a cereal box thickness material for the IAC you cannot buy this gasket. If you were unable to find parts in the US parts are available in Australia up to 2001 and up to 2006 depending on the model of truck in Australia.

[@tellitallnow3914]

@@WorldScienceTV wow!! Thanks for the education!!! Will let ya know the outcome. I love my 1990. still getting me down the road!! Just gotta fix this issue now!! Thanks a million. So I just took my heat gun and put it on the sensor base and the block where it screws into and I let the heat gun warm that area up for a few minutes. . Started the truck and BAM!! Idle went up just a little bit 1500rpms then mmediately started coming back down!! That is most definitely the issue I am having and you pointed me directly to the cause!! Usually it will start and rev at 2000-2500 when below 50 degrees for a good minute or two then gradually come down to normal over 4-5 minutes Putting the heat gun on it and warming that sensor before starting it proved the sensor is the culprit!! Thanks again!!

[@joshwarner3394]

Hey mate I own a 1992 b2600 I an it idles rough we have replaced the air flow sensor next to air box we have no air leaks any idea of what it may be I wish you were in Australia your full of knowledge any help would be appreciated thanks

[@WorldScienceTV]

Always check computer first number one issue with this engine running rough. 2 valve lash adjusters not operating correctly. 3 bad injectors. aftermarket injectors are crap. 4 pour compression. Start there use a timing light and watch the flash on each spark plug wire look for misfire. Please check out my tick and rattle video

[@alejandroresendiz3117]

Hi, how scaning Mazda B2600?

[@mrramsamo76]

Hey there b2600 family. My 1990 4x4 is running strong but it's running way too rich. My tank is empty after only 80miles , no bueno! Any suggestions on why this is happening?

[@WorldScienceTV]

Coolant temp sender, mass air sender, o2 sender will play a part in this check for vacuum leeks this truck gets 16-18 mpg. First have you checked your computer for capacitor leakage. This is the main failure check first.

[@steve852011]

mine doesnt want to start hot, 3 shops unable to diagnose why, i told the last one about the coolant temp sensor and they said they checked it and its functioning. for 30$ i am going to just replace it and see what happens...

[@adamstoby96]

i have somehow only seemed to have ignition issues considering it has not been despite every effort in my power to prevent the multiple times it has overheated in the past due to rotten radiator it has been very mechanically sound

[@Will-us1of]

I have a 93 b2600i I recently rebuild the engine and now I'm not sure where all of the hoses run to. Do you know of any diagrams that show where they run and connect to?

[@WorldScienceTV]

www.dropbox.com/s/uuhelfxz0vygbh3/Mazda%20Bravo%20B2600%20B2500%201996-2009%20Service%20Manual.zip?dl=0

[@roykelly5486]

thanks for sharing, I have a 91,2600i, looking for a rear pinion setup, 4x4 5speed 4.30 ratio

[@WorldScienceTV]

The bearings go out around 200,000 miles in all of them. There is a difference in between auto and manual and generation B2600 87-88 B2600i 89-93 in the USA. From my understanding most or all the manual 5 speeds should have the same ratios. I look for automatic trucks to steel the front and rear diff's because that have a taller gear ratio and you get better fuel mileage on highway and reach higher speeds. But if you spend a lot of time off road best to stay stock. Used diffs are hard to come by in any good condition because of the cheep bearing they used. If you don't se major damage to the ring and pinyon try replacing the bearings. There are ones on craigslist from time to time. And just so you know they ran this truck in Australia till 2003-6 bravo ranger and parts are a lot more available there and you can adapt to OBD2 as well.

[@roykelly5486]

@@WorldScienceTV thanks for answering, i'll try that

[@jd2931]

What would cause no fuel and fuel gauge not working guage. I replaced the pump and really and checked fuses

[@WorldScienceTV]

i have seen road salts eat the wire harness on the frame rail. the body plug is right above the drivers side kick panel aiming down into a relay block test there

[@richardeades6658]

Petrol pump replace under the tray how to remove it

[@davehenry7270]

Does the '89 B2600 have the same ABS unit? I couldn't find anything similar on Ebay, Google images, or Amazon. More to the point, does the '89 have ABS? I'm going to bleed the brakes in my '89, so I'm trying to establish if this year has an ABS system.

[@WorldScienceTV]

The abs system is almost not an abs the abs motor does have a bleed valve and it is over the rear axle on the passenger side the abs computer if it has one is under the drivers seat and if the lid gets dented it will short out the Circuit board

[@davehenry7270]

Nope, no ABS in the '89 (thank god). I'm finding some minor differences in the descriptions of your vehicle and mine. What year is your Mazda?

[@WorldScienceTV]

Mine is a 92

[@NSW]

Really nice video. Im about to buy a 92 2600i 4x4 17000mil. But there seems to be alot of problems with this car due too this video. Is it a good pickup or does this model have more issues than others?

[@WorldScienceTV]

Once you fix the known issues there a great truck and have a good four-wheel-drive

[@robstarski201]

Hay mate Whats the black box at the back of the engine its at the air flow pipe, right in the middle at the top? I got the same engine just my car dosnt have one?

[@robstarski201]

Please any help

[@WorldScienceTV]

It is a vacuum dampening chamber dampened the velocity and surge of air coming through the engine to give a smoother more stable response most of Australian vehicles do not have this this was produced from 89 to 93 in the United States with this vacuum surge storage chamber

[@pabloarguello2265]

Hey man thanks for your videos they are very helpful I need some opinions on what I could do, so couple months ago I finished Putting my 1990 Mazda b2600 back together and I don’t know why but I decided turn the speed idle screw and now the truck won’t even start , it does crank and sometimes it does start but it only lasts 5 to 10 seconds and then it shuts off, also if I give it gas it would shut off immediately, if you can give me some opinions I would really appreciate it, The truck was starting before I decided to turn the screw for the speed idle

[@WorldScienceTV]

Check the ground strap on the back of the head

[@johncook7628]

Hi. I drive a 1991 Mazda b2600i 4X4. I was driving it earlier and it turned off while I was driving and after it did I could start it and when I try to accelerate it turns off right away. Now it turns over fine and I can’t get it to start. Prior to this happening it would seem to sputter while it was idling. I’m guessing fuel pump but I don’t really know. Could u please give me your opinion on this? I had about a quarter tank of gas by the way

[@WorldScienceTV]

Yes it does seem like a fuel delivery problem very first thing is divide the systems in half. In between fuel and spark. Splay some starting fluid in the air box and try to start it. If it starts briefly and dies then you have a fuel delivery problem. If it doesn't start then you have a spark problem. The fuel pump relay is behind the drivers kick panel the relay has a black top yellow bottom. You can pull the black top off and manually engage the relay to see if you're fuel pump runs if you don't hear it from hear then check for 12 volts at the relay and ground if power is present then the fuel pump is out. If not then you have a ground or power delivery problem. The ignition switch can cause this.

[@jd2931]

i have a clacking sounfd coming out of the lifter. do you have a video on how to adjust the lifter on this truck

[@WorldScienceTV]

Yes

[@WorldScienceTV]

Search my channel will say b2600i Ticks and rattles

[@jd2931]

@@WorldScienceTV thank you. Any idea that would cause fuel gauge not to work. No fuel pumping. I changed the pump the relay checked fuses checked wiring. I changed the carpet and then it just wasn't working. Only thing I can think of is I unplugged the transfer case computer and the seat belt buckle connector. I was thinking maybe there is a rollover cut off switch? Truck will run on starter fluid

[@thomashall1726]

Watch at 2:00 and look at the dog in top right lol

[@WorldScienceTV]

That is awesome I never noticed that

[@darwinpena1845]

I did jaja.very nice

[@CesarSanchez-ho4oq]

I NOTICED IT TOO! HAHAH

[@scottyhankemeier9380]

If that coolant sensor fails bad enough, it will run so rich it won't have any power and die alot, also cause idle to hang high too. I had that happen. Idle hang at 2k randomly then week later it would not start or start and no power at all (not drivable) it was way too rich from the bad temp sensor.

[@jorge13629]

I have a 1989 mazda b2600i 4x4. It starts at first, then after 30 or 50 minutes or being warmth up, I turn it off, but when i try to turn it on, it takes about 5 seconds, then I let it run for several minutes turn it off after and try to turn it on and it will not turn on. It'll turn on after 30 minutes and many many tries. I replaced sparkplugs, sparkplug wires, distributor cap ( not the whole distributor) what do you think is wrong with it? Like i said, It'll crank but wont turn on until like 20 or 40 minutes of tries.

[@WorldScienceTV]

Coolant temp sender. Start there

[@jorge13629]

@@WorldScienceTV i did change that and nothing happened

[@johnbryan2414]

My 92 mazda B2600i 2 wheel drive starts and runs good but after driving for a bit the engine starts to sputter and sometimes backfires. If I turn the key off and back on while still rolling it will usually fix for a cpl more miles and then starts up again. It only does this after it is warmed up. Any ideas?

[@WorldScienceTV]

This is usually all on the ignition side of the system the ignition coil is most likely the problem. I am assuming at this point you have done a tune up spark plugs cap and rotor. The ignitor can be at fault to. So what I want you to do is get a timing light put it on each spark plug wire before the problem pull the trigger and watch the flash see if you have a hesitation in the flash and then do the same when the problem starts. If you see a hesitation then it is a spark problem if you don’t it is a computer problem.

[@johnbryan2414]

Well I'll check that however I did take the air filter (sorry my terminology is not up to par) cover off and the hose that went to sensor so I could look at the sensor and i discovered that the sensor had a screen on either side of it. On the side closest to the filter, the screen (which was probably put there by the previous owner and didnt really fit correctly) had dislodged itself and was crammed on top of the sensor. I put it where I thought it was suppose to go and at first it was fine and even had more power. After a while it started again I think because the screen came out again. Not sure I have to check. If it did come loose I'm thinking maybe I'll just take it out?

[@lifeisamazing9980]

I have Misfire on my engine. I replaced the whole throttle body with new, injectors checked, plugs changed and until now it's having a misfire. The misfire only shows when idling and no issues or anything when driving. It doesn't happen in pattern,sometimes once in a second and other times twice. Please help me with any information. The car is in middle east and no one has good idea about what it is. Thank you very much

[@WorldScienceTV]

Is this a b2600i if so check ecm first

[@supnacho7454]

Hey boss my temp gauge doesn’t move is there a quick trick to fix it? Thank you already 🙏🏽

[@supnacho7454]

Turns out it just stays cool as a cucumber

[@julianse829]

Hi there i like your videos very much! I have an issue with my 1993 b2600i 4x4 one day it turned off wgile running and now it cranks but won't star. Any idea of what the issue might be? Thank you!!

[@WorldScienceTV]

Spray some starting fluid down the intake turn it over and see what happens get back to me

[@RoadToDamascus777]

I have a 93 B2600i 2WD my transmission is out. What year transmission from Nissan do you recommend. I’ve already rebuilt it once. I had no idea Nissans shared same transmission. My truck has just been accumulating dust. Thanks for this videos 👍👌🏼

[@WorldScienceTV]

Not sure on the 2 Wheel drive I will have to check

[@RoadToDamascus777]

I’ve search the web for some info. But nothing. I just happened to come across your vid. Keep making more vids on this model trucks. Just not a whole out there about them.

[@WorldScienceTV]

Search r04r01a transmission

[@WorldScienceTV]

www.gtr.co.uk/forum/176224-400-kw-automatic-trans-possible-o.html

[@RoadToDamascus777]

Sorry to bother you again. But you’re the only person I know who knows a lot about this specific truck. So I came across a good bargain on a 91 Mazda MPV same engine obviously. But it’s a five speed M/T. What components will I need for the swap to work. Besides the obvious like clutch master cylinder, clutch pedal assembly and computer flywheel and starter.

[@chrisjoel1982]

Thanks very imformative video ....just recently bought one of this trucks ... the previous owner says that theres is something wrong with the electrical. Its starts only with the MAF disconected . Once is running bogs out if you try to accelerate ....i disconnected the Tps today and now it revs and runs better . Do you think this is a bad computer ?

[@WorldScienceTV]

You absolutely have to inspect the computer number 1 bad running issue with this truck. What year manual or auto. Setting this tps when you put-it back on is a little tricky and requiems a multimeter. Open the computer and tell me if you see corrosion where the capacitors are I have a video of rebuilding one of these.

[@chrisjoel1982]

Ok perfect thank i am going to take a look inside the ECU today

[@chrisjoel1982]

Hey I just took a look on my computer today and it looks like one of the big resistors is leaking is there an email that i can send you the picture Of the leak area?

[@WorldScienceTV]

Send me a privet message and I will respond with email

[@nuttzandboltzgarage1946]

I need some help if you would be so helpful…. My 2600i runs and barely drives. Can get moving but horrible power. Checked computer and it looks new. No corrosion at all on the board. Changed the fuel filter and cleaned the intake with full bottle of carb cleaner. New plugs and wires and it runs alil better. But can barely get itself moving. Yes alil blue smoke on start up. It Boggs and takes a good ten-fifteen seconds for throttle response. Manual trans needs to be goosed to get it moving and floored. Can you toss me a few things to check go thru? Thank you

[@WorldScienceTV]

If your computer hasn’t been rebuilt then you have to consider it bad and that’s very first thing you need to check as find another computer and once you checked out and get that out-of-the-way then we can go other places but you were giving me the the main outcome of a bad computer in your description.

[@WorldScienceTV]

Try to find somebody with the same truck they would’ve already been through this and may be willing to help you by swapping computers with you briefly.

[@PistonShack]

I got 1992 Mazda 2600i for 100$ as my project truck. Only 149K. I have an issue - no rev, vehicle bogs down when accelerating, but it idles good, check compression (in specs as 4 cylinders), oil pressure good, ignition timing set, inline fuel pressure tested. I checked the injector pulse, resistance, checked all ignition components. The previous owner replaced distributor cap, rotor, wires, spark plugs and fuel filter. The vehicle has been sitting for 2 years. Any ideas which direction should i go? I just started troubleshooting my new project yesterday. I would like to make KZbin video and tell viewers about your channel as well. I will put link to your channel under the video. Thanks a lot) for any advice. Cheers!

[@WorldScienceTV]

I had a ecm do this before inspect the ecm. Then check to see if the catalytic converter is plugged and then check the TPS

[@PistonShack]

@@WorldScienceTV Thanks a lot for the advice. I determined what cause engine bogging down. One of the ECU capacitors leaked out. I filmed nice video. It's coming very soon. Thanks again!!!

[@michaelmoses4637]

Am looking for the original injectors for the b2600, the originals carry a needle like tip, an am only getting the ones with 4 holes on the tip

[@WorldScienceTV]

Red or yellow

[@WorldScienceTV]

Number is on the side of the injector. Only way to get new injectors is to buy used ones on eBay