Chevy/GMC how to test for a bad fuel pump tbi

[@kurtsbills185]

Really good video. I like how you touched the items you spoke of instead of making people guess. Top notch video. Thanks for putting your smarts to helping people !

[@maximumredline97]

yw, thanks for the kind words!

[@Godslove218]

Just want to say I owe you a case of beer! My truck was running fine and just wouldn't start one day. There was no gas to the TBI injectors. Changed fuel filter still no gas. Cleaned grounds you show in your video, IT STARTED RIGHT UP. Thank you again and if you want just send me a message. GREAT HELP and THANK YOU FOR SHARING!

[@maximumredline97]

Want my address buddy

[@TCP_dizzy-kf6rx]

@@maximumredline97 yes dad😋

[@melindaortiz9741]

Nice

[@bigjuicy2493]

Lmao mines fucking up and I looked at those grounds thinking that could be the problem but I got fuel pumping

[@stephentaylor9630]

Replaced all the grounds on my 1989 Chevy K2500. Added a few more. Made a huge difference all around. All the lights are about 50% brighter and everything seems to run better. Great video. Thanks.

[@cesarv-el7vt]

Nice I have a 94 2500 and am currently having this no start problem ima check the ground but also seen it could be the relays

[@erinharrison4678]

Thank you, simple, quick and easy to watch. I'm going to check these groups next! Keep up the vids!

[@maximumredline97]

Yw

[@MikeOwen-o8b]

Dude nobody speaks on this issue your spot on thank you so much

[@maximumredline97]

@@MikeOwen-o8b glad I could help!

[@MrNascar4848]

Thanks for the video! It helped me to fix my truck! Both of my gnd wires were an issue!

[@toddjensen7816]

Hey Pernell I got a 94 gmc I'm having the simular issues runs bad, it dies if I don't keep feathering the pedal an will only go 25mph tops. What did you do thanks Todd

[@maximumredline97]

Glad I could help

[@dhanson8404]

Hey bud I’m having a issue with my 94. 350tbi I’m getting power to the purple wire on the fuel pump / sending unit connector. & No Power On The Grey Wire. Was running driving good. Developed a slight spudder around 100-110. Later on In the day it back fired & died. Couldn’t hear fuel pump running changed it out so no luck. Ran a hot wire to it both pumps work fine.

[@austinlepoglow269]

Really appreciate this i have a 88 k1500 5 speed 350 short bed regular cab that my grandparents bought new and i have now owned it for 12 years its my baby and i keep it as clean and nice as i can it just now going on 120000 miles. Me and my wife wer headed back from jay Oklahoma with a trailer on and it just died. Everything stayed on (guages radio lights and so on) but it was basically like i pulled the coil wire off thats how it died. No spitting and sputtering. It had blown a fuse I believe it was a 15 amp fuse that said ecu and I believe thats the module that has the “prime wire” to kick the fuel pump on before the engine has started. Put another fuse in it turned key on it started and died popped another fuse. Then put another fuse in it and as soon as i would turn key on the fuse would pop. So with basically having no other options i put a 30 amp fuse in it and it didnt pop (i know it was stupid but was in the middle of nowhere and about a hour and a half away from home. I was hot and flustered. That worked got it home then put a 15 amp back in it and it didnt pop and hasn’t popped for the past 3 weeks then on my way home from work tonight was going down the road and it did the exact same thing everything stayed on but was like i pulled coil wire so i pushed in the clutch went into neutral and was gonna coast it till it stopped but before the engine quit rotating it busted back off and now has me really scratching my head. Obviously the fuse wasnt popped that time. The fuel pump is original to the truck none of the wiring in or on the truck is hacked up or anything so ima check all the grounds you pointed out. Im a hardcore gearhead just the darn thing got me flustered just because of whos it was and it means the world to me but you have givin me a little more to check out so i sure hope i can find something or i warned it that it was going to become carbureted lol sorry for the rambling and thank you wish me luck

[@lanajantz2240]

Not rambling. Thank you .

[@kanadianbacon7733]

Mine: *"Would run good...touch brake & Shutoff!...move from 4wd to 2wd & shut-off!"* *"Tapped into the Gray Plastic Brake Switch contraption located on left side of upper brake pedal, by crossing the Pink,with Black stripe, wire to 0range wire and B00M! Runs Perfect!"*

[@Llothedon1]

Watched you video and instantly found my problem

[@1bakedcook1e]

That tan and black wire cross ground was my problem too. Thank you so much! 🤘

[@maximumredline97]

Yw bro

[@SloComaro]

Where does the brown wire go into the main harness? I had a rat chew through it and I can’t find where it goes to?

[@1bakedcook1e]

@@SloComaro I’m not 100% sure but I do know those 2 wires have to do with the fuel pump relay. The fuel pump will not turn on, which will tell the computer/controller to not send spark to the coil/spark plugs. Maybe one end goes to the relay and the other to the computer or the fuel pump, possibly all 3 bcuz it’s 2 wires together.

[@SloComaro]

@1bakecook1e ⁠yeah my fuel pump will not turn on and the only thing I see is that I’m missing one of the two grounds beside the thermostat. Rat chewed it but I can’t find the wire anywhere in the harness.

[@1bakedcook1e]

@@SloComaro I can look at mine tomorrow. I have a gen 5 454

[@gregglinka7494]

Hopefully this will be a quick fix and I won’t have to replace the fuel pump. Thanks!

[@YoWhoThisFool]

Was it?

[@gregglinka7494]

@@YoWhoThisFool it was the distributor.

[@Ronjovi77]

Thanks for showing that grond wire i did a carburetor from tbi swap and didn't connect my ground yet so I couldn't find my fuel pump wire good viedo

[@timgrogan883]

Best information that saw on KZbin thank you sir .

[@maximumredline97]

Ur welcome

[@luketamoncannon3795]

Seeing lot of comments on grounds & hots while chasing my own issues, Up by the fuel pump relay under that harness cover is all your "hots" on the firewall, I'm reading tons of comments those are almost hand loose from the factory, I just checked; mine were not that tight also, cleaning them up tomorrow.. Couple more grounds, ones behind the distributor area from motor to firewall area, also ground strap near the starter..

[@D_BOW_GOD]

Ik this is old but thx bro this really help me and I am 22 I just bought. This truck thx 🙏

[@maximumredline97]

Yw man

[@D_BOW_GOD]

@@maximumredline97 it really help

[@staceyevans188]

@@maximumredline97 if I got no fire going to orange wire on relay what do I do?

[@maximumredline97]

@@staceyevans188 cut it back run a wire straight to battery see if it changes anything

[@staceyevans188]

@@maximumredline97 ok thanks!!!

[@philipnehri1773]

My 93 Chevy van cranks, no start! No pump prime. Fuel pump is only a couple years old..after watching your vid, I’m going to check all the grounds I can find...thanks!

[@MOE13576]

Ever figured it out?

[@juggernautRico10]

What what it

[@MOE13576]

@@juggernautRico10 mine was that tge fuel pump wasn't plugged 😂🤦🏻‍♂️

[@iamrobbiero]

@@MOE13576 plugged in the tank or the exterior harness?

[@MOE13576]

@@iamrobbiero are you asking me what was my solution ?

[@canyondanhandyman1784]

Thanks a lot. good video. My 93 2500 is running but not running good. I will check all the grounds and the pump relay first before I pressure test the pump.

[@patrickjones1061]

Great explanational video. Thank you very much my friend

[@thesourkroutkid]

I got a chevy 92 caprice 305 with electric gremlin gas vent issue if i have a pulse but no throtlle it stalls an puffs back at tbi

[@cap3724]

Wow this dude solve my issues I have a 1992 s10 blazer ,I left them ungrounded and wonder why I been have starting issues

[@maximumredline97]

hell yeah thanks

[@cesarv-el7vt]

Starting issues as far as it not starting on first crank but second time it would? Currently have this issue now it won’t start assuming fuel pump but wit this video I’d check relays and grounds cause mine did have that start issue also

[@kryptikarts3922]

Guy i bought it off of did the distributor, plugs and cables I’ve done tbi rebuild, injectors, iac & temp sensor getting ready for a fuel pump but i might have to get these ground cables a look, 1989 chevy scottsdale 2500 5.7 140,000 miles starts and runs but stalls randomly, loss of power also randomly, even randomly stalls after idling a couple minutes sometimes

[@D-train69]

I have the same problem as you right now. I'm pulling my hair out trying to figure it out. Any help will be much appreciated Thanks.

[@slim929rr]

I'm having the same issue. Any luck finding the issue

[@slim929rr]

​@@D-train69 did find you issue?

[@SamTrelfa-i3n]

I was having the same issue with my 88 c2500, I had to cut about 2 inches back, on the 2 ground wires he has next to the thermostat housing. (His finger is on it at the end of the video)

[@MikeAtkinson-q6e]

'90 C2500 5.7L starts and runs ok until you get up to road speed. Then it starts coughing, farting, hiccupping, and stumbling. Cobbled together some fittings and bought a low pressure fuel gauge and checked pressure just before tbi. If I remember, it's supposed to be 5-15psi. Mine was only 2-3psi. Dropped the tank and replaced the fuel pump. Worked great for about 7years. Now I need to check again.

[@jamesharris690]

What voltage is supposed to be at the orange wire at the relay? Im getting 2 volts DC.

[@cailcampbell5890]

Yes. You seem to have the exact same type of truck that I do. Can you tell me where the starter relay is on that truck?

[@IsaiasMoreno.]

When you didnt hear your pump would your truck still run . On mine i cant hear the pump and installed a new one and no change but will run for 20 30 minutes then shuts off and have to wait another 30 minutes to start

[@frankgonz31]

Great video, I'm having trouble with my 90 silverado I put another used engine supposed to be good, cause first engine got messed up and now when I tried key it only cranks, don't hear the fuel pump. I think I put every single sensor right everything looks good but won't start, I'll see when I come back from out of town and do what you did. I'm kind of lost on those grounds near the water outlet and on ac compressor on mine. Help

[@bobstewart4989]

Reaching out for some help. I'm in the same boat. I've got a 90 chevy Scottsdale . Put a new used motor in. Anyways, same story as yours. Did you get yours figured out? I'm stumped.

[@frankgonz31]

@@bobstewart4989 hope you figured it out, if not I mistakenly sent myself a reply to your question. It might help you

[@bobstewart4989]

@lastofthegoods OK. Thanks. Haven't figured mine out yet. Got fire. Everything is grounded. New sensors, etc. Just can't get fire to my fuel pump. Next move is a hot wire to my fuel pump plug from the junction box under the dash by the firewall. I just don't want to fry something. Lol. Thanks again.

[@frankgonz31]

@@bobstewart4989 try putting some fuel with a bottle, make a small hole on cap and spray fuel onto carb,if it won't fire up having spark on plugs then it's the timing

[@S2kbandit]

Having this problem on 87 new relay. I checked the 2 wires at the pump the ground coming from the harness was not solid.

[@juansgalvan7265]

I have a 1985 Blazer, I replaced the sending unit, I'm replacing the gas pump and my next thing will be the carburetor, because the Blazer running really bad 😞 sounds like fireworks coming from the carburetor, what is your take on this??

[@maximumredline97]

checking ur timing

[@rez6757]

i recently purchased a 1995 c1500 w/t with a 4.3 votec wasnt getting fuel so i replaced the fuel pump in the gas tank its getting gas up to the throttle body now but the throttle body doesnt seem to be working

[@sosakiing4598]

My injectors are working and my truck will turn over and eventually it will crank but it would be really weak like sputtering I changed the fuel filter I was about to change the fuel pump but I saw this video my ground on the left side of the fuse box is corroded this could be my problem too right

[@MapleRocket]

did you check distributor cap?

[@sosakiing4598]

@@MapleRocket what do I need to check it ended up being a blown head gasket

[@MapleRocket]

@@sosakiing4598 man that sucks.. but to check your distributor cap and rotor, you have to unscrew the 2 screws holding it down im not sure the socket size but if they arent striped or too rusted you can probably use a philips screw driver. just pull it off and look inside and see if its clean or corroded or wet. if it is you can clean it with some sand paper temporarily or replace it for like 30 bucks

[@mitchvass4498]

Howdy, Thanks for the video very informative. Question, please. (Vehicle 1993 Flair motor home 454 TBI) My symptom is: Starts for a few seconds and then dies. If I give it the gas pedal, let off speeds ups, then it dies. Keep feathering gas pedal stay lit, won't go high RPMs. But will keep running, if I keep feathering and letting off the gas pedal. Turn key on start, starts a few seconds dies. If give it gas to accelerate in park it dies. I can do the gas pedal thing give it gas let off, give it gas let off, and will stay lit, RPMs go up, as I stop doing this it dies. Suggestion to check, please. Thanks.

[@mikeSUSTAITA-z8h]

having a problem with no fuel to the injector. If I pour fuel into the TBI it will start, but the injector are not working and not providing fuel, could it be a grounding problem?

[@housephone8646]

Thank you for making this video

[@Mike30650]

i did a motor swap in my truck i put a 71' 350, and my fuel puel wont cut on at all, i hope this will help out

[@clear618]

Great video very helpful. Is there a ground also back at the fuel pump under the bed?

[@redhot8041]

Yes there is one for the fuel pump, that is near the fuel pump and grounds to the frame.

[@edwardritchey8257]

I just did a swap from a 5.0 to 5.7. I’m getting spark no gas tho I’m hoping it’s just a ground. I will check tomorrow thanks for the vid hope it helps me. Just out of curiosity my 5.0 ecm will run the 5.7 correct? Just maybe a little lean?

[@maximumredline97]

yes the computer for 305 350 is the same. or at least should be.

[@dercifiller5082]

I'm having to floor my truck after it gets warmed up to start it again after running to the store sometimes. Do you suggest any common problems with this issue

[@maximumredline97]

does the engine smoke any? could just be getting hot and then weak. correct fuel pressure? when was the last tune up? o2 sensor?

[@possum9562]

thanks Boss im currently chasing wires on my 1993 2500 just had a new pump installed 3 months ago and a puff of smoke shut me down today

[@cesarv-el7vt]

Nice I have a 94 2500 and am currently having the same issues ima check out the grounds

[@cesarluna2922]

Hey man what exactly is that lil fuse holder the one you said to check the ground on after the relay ?? I have no power going there I wanna know exactly what it is

[@maximumredline97]

i think ur talking about the fuel pump relay

[@cesarluna2922]

@@maximumredline97 no I was talking about the fuse one the second one you said to check grounds on

[@MadAtMax.300Blackout]

How do I test these? With a multimeter right? I need to find good info on using one to check these things cause I'm having some issue

[@559Obsalex]

My fuel pump is humming im getting fuel behind the tbi but my injectors aren’t spraying i checked all my fuses all good i do have my ground to my battery i just dont have the little ground connected anywhere can that be my problem?

[@craigp7363]

My fuel pump is working and got fire off sparkplugs and won't start but wants to. This truck was running fine then just died like I shut the key off any help would be appreciated

[@Livemusic1800]

Help !!! My 1990 chevy turns on fine however when i accelerate is stalls like no gas goes thru.

[@rampagefallen]

Mine does that sometimes too

[@jasomkovac9115]

@@rampagefallen , so how did you fix it? Same prob.

[@JamoOnTheGo247]

I’ve got a 1993 TBI Chevy K1500 it cranks and fires up but after a couple seconds it dies. I can get it to stay running but it doesn’t run well. I’ve replaced the fuel filter, air idle control, throttle body, map sensor, engine coolant temp sensor, cap and rotor, ignition coil and ignition module, egr valve and egr solenoid. And it still is doing the same thing. Any guesses?

[@andyreynoso8]

Hey bro mines doing the same thing. You figure your problem yet?

[@gabriels3106]

I also have this issue if anyone else has figured it out. I am trying not to replace my fuel pump

[@SiCkDiAbLo]

Mine did the samething, this morning went out, just would crank...Went and bought a fuel pump relay, but I'll check the grounds first..Thanks

[@maximumredline97]

Yw lmk how it goes bro

[@andylangeland496]

I just did a new pump and filter, engine cranks, but won't start. I can hear the pump prime when I turn the key, and the engine will start for a moment on starter fluid... what did you end up doing?

[@maximumredline97]

@@andylangeland496 if it will start off starting fluid then u have a fuel delivery problem, recheck ur work. Pump lines and filter

[@andylangeland496]

@@maximumredline97 ok thanks

[@blacksodomia187]

i had crank, could hear pump no start. ended up being the ignition control module

[@richmoore942]

How much volts should be going to fuel pump

[@zekeestrada6192]

Quick question...before u fixed ur ground, was ur fuel pump turning on still??

[@dr.auggie1109]

Mine would start and run but as soon as I steeped on the gas it would cut out. New fuel pump, new injectors, new distributor cap and rotor, new tps. It ended up being the fuel relay. It would start because on these older Chevys the oil switch activated the fuel pump but only for so long

[@derekhardin7486]

Ok. I havent checked the relay or grounds. I went ahead and replaced the pump and strainer. Turn over, no start. Pump is running though. No fuel getting to the tbi. 1988 gmc 1500.

[@my95chevy]

Try the fuel filter

[@andylangeland496]

I have the same exact situation, did you figure it out?

[@derekhardin7486]

@@andylangeland496 yes. It was a fuse. I cant remember which one. I sold the truck shortly after i fixed it.

[@andylangeland496]

@@derekhardin7486 thanks

[@559Obsalex]

@@andylangeland496 did u solve ur issues im having the same issue pump running fuel to tbi no fuel injectors

[@Superflyssrs]

Thanks for all your videos. So I have an 87 Chevy Silverado and I can drive it for 20 , 30 miles or more and no issues, but if I shut it off it won't start until it cools off. Then it starts right up. I also noticed that I can't hear the fuel pump after I turn it off . Once, the engine cools off I am able to hear the fuel pump priming the system . Any idea.

[@melindaortiz9741]

ignition coil

[@melindaortiz9741]

Fuel pump run cold because of fuel

[@Superflyssrs]

Yes it ended up being the fuel pump. It threw me off because the fuel pump had been replaced 5 or 6 months ago. Also, I don't remember the fuel psi that it had but I remember it was within the specs . That's also another reason I was sure it wasn't the fuel pump. Someone mentioned that it might have a good psi when cold but once it would warm up it would loose psi and that it wasn't enough to overcome the heat soak after it was turned off. So I installed an Ac Delco fuel pump and now it runs great and it starts everytime. Like I said I just didn't think it was the fuel pump because it was almost new. Hope this helps someone else.

[@CJ9494.]

What brand fuel pump was the bad brand?

[@Superflyssrs]

@@CJ9494. It was a fuel pump from Autozone. It ended up using an AC Delco and solved my issues.

[@goodolecommonsense]

Great job on the video, you gave me some ideas to work on.

[@richardcottrell3264]

What about the engine coolant temperature sensor. I have had problems with starting and it shutting off going down the road

[@maximumredline97]

Yes it can give u a world of problems

[@cr250rish]

I’ve cleaned a couple of grounds and new fuel pump relay. Going to clean those two you showed us tomorrow. I have a multimeter but don’t know shit about it please tell me how I check that orange wire for power

[@iamrobbiero]

Place the black probe on a known Ground and the red probe on the orange pin. Not sure but it should read about 12 volts. Reference the Haynes Book or other wiring diagrams for reference.

[@blessedindividual9877]

Is this for a 91 caprice to?

[@tyglass8752]

thanks. grounds fixed the issue

[@williamsobers5057]

Great video! My truck will crank all day and not start. Already checked all the fuses and the relay. In the process of removing the tank on my 1990 K1500 Silverado. I get 12.5 volts at the relay but only 5.5 volts at the pump. Been on Google for hours and can't find anything about the correct voltage at the fuel pump. I'm guessing it should be 12 volts. The tank has a bad leak so needs replaced anyway. Going to replace the fuel pump and pickup assembly while its out. Any insight would be appreciated.

[@KJ7SIR]

Voltage Drop due to high resistance . Check the voltage before and after each connection . With circuit on , also should he zero volts on the ground wire , voltage = Poor ground

[@williamsobers5057]

@@KJ7SIR ended up replacing the fuel pump. Fires right up now. I tapped the old fuel pump with a plastic hammer and it started working. Figure it froze up from sitting in an empty tank for 2 years.

[@bkrgi]

I'm chasing a won't start after shutting off when hot randomly or will randomly stall when idling... figuring a ground up front is my cause as fuel pump is running but injectors not squirting. Dump a splash of fuel into the TBI and she will catch.

[@Boogerboys1990]

Same any luck figuring it out?

[@paulbaker3144]

I have what sounds like exactly the same symptoms. I looked at several websites that said the ignition control module can cause it to stop running when it heats up. A new IGM did not cure it so now I’m testing the fuel supply. I’ll dump a little fuel in it and see if it will run when hot.

[@bkrgi]

@@paulbaker3144 Mine ended up being a intermittent grounding issue on the sending/fuel pump unit that finally just stopped being connected....that happened in the driveway thank you. Did not pin point the ground break spot but think it is within the grommet exiting the sending unit. Had another sending unit and that fixed my issue. My hint of the issue is finally the fuel gauge stopped working as well...was kinda off/on in resistance prior.

[@paulbaker3144]

Thanks for the ideas. I’m getting erratic intermittent readings on fuel pressure and voltage so will keep tinkering with the wiring. Im wondering if hot wiring power direct to the pump will bypass faulty wiring?

[@bkrgi]

@@paulbaker3144 And create a good ground clamp on the return line at the sending unit as well or first...

[@derekhardin7486]

I changed my pump. All fuses and the relay are good. No fuel coming out of the injectors. The day the pump went out the injectors were spraying fuel out. Replaced the pump now no fuel?

[@andylangeland496]

I have a similar situation - new pump, new filter, van will turn over if you spray starting fluid in TBI but won't stay on, I can here the pump prime when I turn the key... did you figure it out?

[@559Obsalex]

@@andylangeland496 hey dis u figure it out im having same issues hep

[@andylangeland496]

@@559Obsalex yes it was a corroded ground at the engine block coming from the battery. Here is a video i made about it... hope it helps kzbin.info/www/bejne/q3-qmmt7rNSJopo

[@559Obsalex]

@@andylangeland496 i cleaned it up but still nothing i do not have the little ground connected can that be a issue to?

[@andylangeland496]

@@559Obsalex yeah all the grounds need to be connected... the TBI unit is electrically powered and needs that power source. If the ground isn't connected then it can't spray the fuel into the bowl. You can check your TBI unit with a 9 volt battery... probably just look it up on KZbin... its simple but hard to describe in text

[@vernonvest9927]

Will not a full ground keep my 93 Chev 4.3 from running good how to check for good ground ,i when

[@vernonvest9927]

I accelerate not doing well .

[@skylerpratt2306]

Mine drives fine but when trying to cruise it just makes this tapping, chugging sound after it warms up. It's a remanned motor with only 6k miles on it. I've replaced the tbi gasket, TPS sensor, IAC valve, EGR valve, map sensor, knock sensor, ignition coil, and almost everything else. I'm at my wits end with it. Gonna check my grounds on it tomorrow.

[@sirjohnahayfalcon]

How do you check to see if your grounds are up to par?

[@pino1000]

Hey. Any solution found?

[@skylerpratt2306]

I've found out that I've got a couple shorts in my wiring somewhere and the tapping sound is coming from the frame into the cab. Can mounts are hashed

[@adamvaughan6959]

I got a 95 gmc my fuel injectors get constant power and ground and dump fuel through intake could throw in the rite direction

[@jesusmorfin1907]

I just did a motor swap and now I’m not getting any fuel on the tbi I’m going to have to double checked all those grounds tomorrow thanks great video

[@maximumredline97]

Ok let me know if you need any help! Is the fuel pump coming on??

[@soonjrush]

​@@maximumredline97 On my 93 S10 V6 TBI, I just replaced fuel pump and filter because pump was bad and sitting. Pump comes on but injectors are not coming on. Cranks but no start. Will check grounds, thanks.

[@maximumredline97]

@@soonjrush have someone crank it and see if fuel comes out of the injectors while cranking

[@soonjrush]

also tested injectors with 9 volt battery, good.

[@maximumredline97]

@@soonjrush spray some starting fluid and see if she will fire up

[@benornellas1856]

I could really use your help on a separate issue...can't figure out missfire on 95 GMC k1500...

[@maximumredline97]

More info plz

[@coolmw2player]

love how jerryrigged these cars are usually yet never die. maybe wont start one day but spend 20 minutes reading the manual and youll figure out how to gete'r running

[@sandrahollyfield3266]

What do you check the wires with

[@maximumredline97]

Basic test light

[@themanager3406]

Okay but why is my fuel pump staying on after turning of my engine? Also making my battery gauge read high

[@Pursnikity_20022]

I’m having the issue that my gauge is not reading correctly.

[@tonyedward6909]

Had static in my audio speakers thought they were cracked also gauges didn't work properly found a ground that wasn't grounded. Fixed. Ground issues are 90% of problems.

[@toddjensen7816]

Howed you test the fuel relay the orange wire thanks

[@jesusgalindo9210]

Testing the orange wire itself, if its a power wire, just grab a test light. It will light up. The relay usually has a schematic on the top side, showing you which way it trips. After that you can probe it to see if it clicks, or grab a voltmeter and test for continuity. If that checks out i would definitely probe afterwards to see if its working.

[@toddjensen7816]

@@jesusgalindo9210 okay 👌thanks

[@danfaller1089]

Thanx,, got to clean all grounds

[@jerrywhitlock4028]

I have a 1996 gmc 1500 that will not start. It starts if gas is poured into throttle body.

[@mattreeves5434]

Basically a 4.3 vacuum line for egr and the wiring probly would help it's on a 1989 Chevy 1500

[@markthompsoncpa]

How do you check the ground

[@maximumredline97]

Visual

[@jamesdodson9417]

Just clean them while your thinking about it eliminates one less thing

[@krissheepskin8066]

I got 95 gmz 5.7 idles fine n smooth dnt stall but sputter around 80 stile at 40 km I change fuel filter tps clean carburetor

[@josecamacho4558]

I’m having a problem with my 98 Chevy suburban it takes a long time to turn on.

[@MegaGsizzle]

Nice video thanks

[@butchdoster329]

oh i have a question,how do you check the ground im about to give this up ,everybody says check this check that ,show me

[@maximumredline97]

Check grounds as in take them off clean them make damn sure it has good connection bc if the ground I'm showing you in the video has bad connection then ur fuel pump will not work

[@butchdoster329]

@@maximumredline97 sounds good because it does when it pleases,thank you very much..il let you know how it goes.

[@michaelpearce8661]

@@butchdoster329 how did it go? I'm having some of the same problems. Have a phantom voltage of 12.3 volts on pin 30. No other voltage on any other points on the pigtail. Checked the ground pin a had good light on the continuity tester.

[@michaelpearce8661]

@@butchdoster329 I thought I had a good ground but I double checked the ground isn't grounded.

[@TheUndertoe]

My fuel pump is humming but I still ain’t getting fuel well

[@pedrorojascervantes3928]

Check your fuel pressure, must T in at the fuel filter on the frame rail.kzbin.info/www/bejne/d6ranpacedF7aac Disconnect the injectors & fit a noid light into the connector to check for harness integrity and that you're getting a signal from your ECM Ensure the fuel pressure regulator right behind the injectors is not leaking.

[@andrewmiramontes6060]

I have a 1990 Chevy and it turns on fine. But when you put in reverse or stop or come to a stop while driving it idles down and sometimes turns off. Any suggestions? We’ve replaced the fuel pump as well already.

[@BackyardDad1]

I have the same problem but it’s every stop it dies. And then fires right back up and head to the next stop sign and start it back up. Still looking for the problem

[@andrewmiramontes6060]

@@BackyardDad1 it does this to me as well. Turns right back on but then turns off

[@pino1000]

Same with my r10. You have any solution?

[@dougsmith4879]

Thanks for the info!!

[@maximumredline97]

Yw

[@oldbiker9739]

thers also a ground for your fuel pump on the drivers side at the rear frame .

[@torrischappell7339]

My gmc has 2 relays one under hood and one on side of battery

[@adamlison6421]

I need help please! I cant figure out on my 1995 K1500 suburban tbi My truck suddenly won't let me go faster than 35mph When I finally made it home When I parked it my truck aggressively shakes and die Every time I start it. It has a full tune up also rebuilt throttle body/ new egr/ no vacuum leaks an my pump does prime I just can't figure it out what's wrong, I know my timing is perfectly fine I'm so Confuse.. any ideas you may know?

[@maximumredline97]

Does it smell like its flooding? Does it load up and smoke?

[@adamlison6421]

Yes It does smell like it its flooding, but no smoke

[@patredoski5809]

If the temp sensor is bad the computer keeps running rich and can burn out the catalytic converter and clog it or muffler up. Easy check is if it’s running is much exhaust flowing out.

[@Beltran.602]

@@patredoski5809 ?

[@irodrodriguez2248]

Hey I have a 93 Chevy and my injectors won't shot gas!!!

[@Gsxr_ghostzz]

Nah bro I owe you something Iv been looking all through stuff I almost just bought a fule pump nothing talks about these wires as soon as I seen the ground next to the water pump part I went out looked at mine in gusse what it’s snapped inhalf I put a new connector on it boom she started right up

[@undergroundsoldiernightvis491]

Thanks thumbs up

[@IJS433]

I own an 88 sierra single cab long box. Motor swapped to a 94. My truck died 3 times in way home. Died in front of 2 cops. Ill check my fuel, batterey and alternator

[@maximumredline97]

hopefully you wasnt riding dirty lol babe

[@michaelmoore1390]

I change my fuel, injector , fuel pressure, regulator idle air And still running, like it’s not getting no gas

[@ethan-py9he]

How’s the catalytic converter?

[@rolandosandoval6773]

Help a brother out man..Rebuild a motor. First time. No gas to injectors, I hear a click and it turns , But dont hear the pump although relay is good.

[@jonpitt1242]

I've got an 89 Blazer 5.7 with tbi. New fuel pump, filter, injectors twice!, rebuilt pressure regulator, new Idle air control sensor, map sensor, throttle position sensor and new ECM! The grounds all look ok. It is still running way to rich at idle... It was running fine and all of a sudden started running like hell. I thought it was water in the fuel because the filter was full of water. I dropped the tank again! Drained all the fuel and water and ran acetone through the tank to help evaporate any water before putting it back in. I'm so frustrated and tired of throwing money at the problem

[@maximumredline97]

K5?

[@jonpitt1242]

@@maximumredline97 yes and no.. technically V10 Blazer..still a square body full size

[@jonpitt1242]

Update! I pulled the entire throttle body from the intake to inspect. Also need to mention the truck sat for 6-8 years. Mud Daubers had completely filled the cavity for the idle air control sensor and a couple other ports. I also found the plastic gasket on the fuel return nipple had been crushed and was wedged folded over inside the throttle body.. Putting it back together in a few minutes

[@jonpitt1242]

Nope still running rich at idle. It idled for about 10 minutes. I shut it off and restart won't idle at all

[@jonpitt1242]

Still frustrated with this damn truck! Replaced the fuel pump again and it's still running rich at idle!

[@memyselfandi5415]

Thank you 👍

[@mattreeves5434]

Your engine looked same as identical to mine

[@jacobs.3952]

i ordered a new fuel pump relay and it didn't fix it. I didn't even think about checking these. Thanks for the vid

[@dwayneholbrook4056]

On the frame where the fuel tank is there is a ground there too move that ground to a clean spot it comes from the sending unit that can make it not work at all

[@MathieuTechMoto]

Thanks !

[@jackiegraham6875]

Thank you.

[@javiersolis1456]

My fuel pump won’t turn off

[@ACarnealqwerty]

Womp womp sell it for parts

[@vskillz8832]

Fuel injectors spraying after truck is turned off. Truck won't start.

[@Supaslow5.3]

i have a gmc sierra 1992 i have a video on my youtube channel it has the tbi 454 if you could go and watch that video and tell me what you think it may be that would be awesome

[@maximumredline97]

I will as soon as I get electric back and wifi, bairly have enough service to receive any notifications lol

[@Supaslow5.3]

@@maximumredline97 ok great

[@Supaslow5.3]

@@maximumredline97 hey man did you every watch the video on tin 454 ? I’m confused on what to do

[@sandrahollyfield3266]

People tell me I could take the whole truck bed off I have a 99 Chevrolet 2500 3/4 ton truck how the woman going to do that

[@tyjohnston5889]

Take all the bolts off your bed. Then put center on blocks on both sides. Slide 2x6 or 3x4s under bed. Jack up bed, add blocks as you get higher. Push truck out from underneath the bed. Afyet fixing push truck back under bed and let down slowly. If you can't physically move truck, use riding lawnmower

[@jamesdodson9417]

Just drop the tank its not that bad a couple of beers and bingo

[@deanyanko3326]

you gettum strong smart mechanic.who loves women more than mula.

[@noelmcdaniel7902]

Have power on orange wire have power on middle plug at fire wall for 15 sec. Pump may run for weeks then not run for weeks no rhyme or reason for it to stop or start pump is 3 yrs old

[@WilbernLambert]

My 1987 one spras and don't shut off

[@sandrahollyfield3266]

The fuel isn't getting to the injectors is not enough power or pressure to pull the gas to their I'm told by an ominous people it is the fuel pump

[@maximumredline97]

More than likely

[@TCP_dizzy-kf6rx]

Fucking battery ground..😂