How to Test Fuel Pressure, Pump and Main Fuel Relay - Honda Civic CRX 88-91 EF

[@JKD4AG]

I have to say bro, there are alot of guys out there...but you know your stuff. You deserve way more recognition. Keep up the good work.

[@GarageBuiltHondas]

Wintin Wolf Thanks so much for the vote of confidence!!

[@carlomango407]

Garage Built Hondas Hi, I have a 1988 Honda Civic .. the car was sitting for about a year without being driven because of a bad distributor.. Finally, I replaced the whole distributor and main relay which is OEM. Then, because the car was sitting for a year I also put in a brand new battery, did an oil change and put in fresh fuel in tank.. sufficiently enough to start the car.. still car has no spark and it appears no fuel pressure. This is what the mechanic told me over the phone because the car is located far away. Also, when he turns key to "on" position, the check engine light comes on but it doesn't shot off.. it remains on.... the car still has same ignition wires by NGK and same NGK spark plugs.. also when you crank it the technometer needle does not move at all..

[@carlomango407]

Garage Built Hondas I would appreciate your help.. thank you

[@GarageBuiltHondas]

Ecu might be bad especially if the CEL comes on and doesn't turn off.

[@carlomango407]

Garage Built Hondas How do I test my 88 Honda Civic sedan ECU with a test light? is there a simple method? I wanna check and make sure is the ECU like you said... do you know where is the fuse for the ECU? thank you for your help

[@BruhduhMoose]

Was convinced my low fuel pressure was electrical since it seemed the problems only came after I blew a fuse. Finally caved and with the help of this vid, diagnosed that it was my FPR and Filter that were the problem. The gas I poured out of the filter literally looked like mud... My 91 HF runs like a dream now, thanks for the help man.

[@michaelgorey4985]

I really appreciate how you solve the problem by working through one item at a time. Just like my Dad taught me! Great job.

[@GarageBuiltHondas]

Same here. Dad's doing a good job for us! ❤️

[@jojoedanc3r]

I admire your work ethic to make sure you're not wasting time. You went thru all the steps to make sure it was the fuel pump first instead of just throwing parts at it

[@GarageBuiltHondas]

+PURE Virginia Man, you have to!! Dropping the tank is a pain in the booty! And thanks man, I'm trying to set a good example for anyone attempting this in the future!

[@clintplum2129]

@@GarageBuiltHondas I'm late to this thread so hopefully you see this. If I have a 96 civic that doesn't require removing the gas tank but I also don't have the fuel pressure gauge., would you say it's worth a shot and just examining the fuel pump and sock, or should I actually buy or rent a fuel pressure gauge and make sure it is indeed the fuel pump. My car is experiencing different issues. Car will start but immediately dies at times, sometimes will not start at all without applying the gas, and sometimes will just work fine. It

[@GarageBuiltHondas]

Examining it won't tell you much especially if it still looks relatively clean. A pressure test is the easiest way to go and out if the pump is doing it's job.

[@oregonfelder1]

Just picked up a 91 sedan that is not getting fuel. Going to start down this path. I’m so glad you laid it out in a logical process. Crossing my fingers that it’s the relay and not the pump 😂.

[@GarageBuiltHondas]

There's a good chance it is!! Can't tell you how many times I've seen a bad relay.

[@keng5075]

I applaud your patience and though instruction. You are a most vital resource in educating our next generation of repair enthusious.. Thank you for restoring my faith in online KZbin turorials

[@GarageBuiltHondas]

I really liked your comment, thank you!

[@keng5075]

No no, Thank you! For being you.

[@keng5075]

Don't ever let it go to your head, at the same time try not to second guess your true naturally acquired talent. As we age some of us forget more than most people will ever know...

[@nolanritter641]

I can confirm what he says at 16:20 is correct, don’t use that small sock that comes with the fuel pump, you’ll have issues like hesitation, bad idle, engine dies at 1/4 - 1/2 tank. Replace that sock with a longer OE style sock and save yourself the stress.

[@manny5138]

Just changed my fuel tank on my 88 hatch and when my car is less than half a tank and I’m going up a slight hill my check engine light comes on and it seems like it wants to die. Do you think that stupid sock could be the culprit?

[@GarageBuiltHondas]

What was the CEL saying it was?

[@ALE5six1]

Was about to give up on my CRX with all its intermittent fuel issues. Thank you so much for this!!! 🙏

[@GarageBuiltHondas]

Glad it helped!

[@ALE5six1]

​@GarageBuiltHondas replaced the fuel main relay. Ignition switch and fuel filter. Fuel pressure jumps to 50 when pump primes but immediately decreases back down to 10 after 1-2 secs. So can't get it to start. I checked each spark plug inlet for leaking injectors into cylinders, and nothing. If I pinch the fuel return line on the regulator, the pressure jumps up to above 80, and the fuel pump makes strange noises but still goes back down to 10. That seem like the fuel pump not holding pressure or something else?

[@ronniecatalano5246]

Awesome! Can you test for fuel pressure if it won’t start?

[@ALE5six1]

@ronniecatalano5246 yes you can. Off the fuel filter. But make sure the pump is actually priming as it should , when turning key to first click/accessory.

[@isaiahlawson6797]

Fuel pump went out on me half way through a seven hour drive. Long day... your video helped me troubleshoot it though, thank you.

[@needles300]

I appreciate this info, I’ve been chasing around a stuttering/ bogging issue for a while since I’ve replaced the fuel pump with a whole unit, (different style sock) and my car dies at 1/4 tank

[@GarageBuiltHondas]

Good luck!

[@inspyral02]

Hey Jon, when you go to read the vacuum line off pressure, it's usually a good idea to pinch off the end of the disconnected hose so you're only reading the difference from the fuel pressure regulator and so your idle isn't effected too much by the vacuum leak.

[@GarageBuiltHondas]

+inspyral02 No it's fine. That's how it is supposed to be read. You're intentionally creating the vacuum leak to raise the idle.

[@inspyral02]

The Honda/Helm's service manual for EK Civics says to disconnect and pinch/clamp the hose when comparing readings. Makes sense since the FPR adjusts fuel pressure based on vacuum and not engine speed, so it's not really necessary to create a vacuum leak, intentional or not. The DC Integra service manual says the same thing, but it might be different for earlier Hondas. Good video nonetheless.

[@GarageBuiltHondas]

inspyral02 Well sh*t, maybe I've been doing it wrong the whole time. I was taught this way a long time ago and have used it ever since. Next time I test another one I'll try it. Might not be for a while, it had been years since I last tested fuel pressure.

[@inspyral02]

I don't think it would actually have much of an effect on the fuel pressure readings, at least on late model Hondas. It's probably more about preventing unnecessary wear and tear from running with that small vacuum leak, especially since the FPR doesn't really care what RPM you're idling at. Here are the relevant pages from the EK/DC manuals: imgur.com/a/vSpce

[@GarageBuiltHondas]

+inspyral02 ok, thanks! Learn something new every day! Appreciate that!

[@marcoshoffner1738]

Experience is king

[@stevensmodrnlife]

Glad I watched this. I just bought a 1990 Civic STD and it's a little boggy sometimes while driving and if I bring the rpms up while sitting still it kinda fluctuates and sounds like it's struggling. I know what I'm doing Saturday...

[@GarageBuiltHondas]

+Steven Arias awesome!!

[@johnnyo3fan]

Just wanted to share my experience with the fuel pump relay on my 90 civic. It would start just fine and I would drive to the gas station. After filling up it would not start, no fuel pump sound. I would wait a few minutes, turn the key and it would fire right up. Inside the relay are two separate relays, each with its own plastic cover. When the relay got warm, one of those covers would warp, preventing the relay from closing!!! I removed the plastic cover and haven't had a problem since.

[@GarageBuiltHondas]

Wow, excellent diagnose. Thanks for sharing that!!

[@newgunner1771]

Tested this out on my relay thanks for saving me the trip to oriellys and not to mention the $

[@GarageBuiltHondas]

Glad to help!

[@BilderbergCEO]

You sound like a low-key ChrisFix. Great video! Thanks!

[@GarageBuiltHondas]

That's a great compliment, thank you!

[@z1522]

For the quick resoldering of the board, if cracks are showing, just dab a bit of flux on the spots, no need to add or use more solder which might flow across an adjacent area. At 8:45, the screw on top of the right 'Banjo' bolt is a pressure release, and should access to check line pressure without messing with either of the Banjo bolts which hold the lines into place, an easier and less compromising method if a fitting is available.

[@mikearts6836]

Thanks for the tips trying to fix my car. What wheels are those on your track car?

[@GarageBuiltHondas]

Been forever since I've seen this video. What color are they?

[@mikearts6836]

@@GarageBuiltHondas bronze? Its shown at 7:14

[@GarageBuiltHondas]

Traklite Gear. They've been discontinued a long time. I'm unsure if Traklite even makes wheels anymore

[@RichLifeStories]

Wow very informative! best content I have seen in awhile! I watch plenty of repairs on different vehicles but, Never seen a video so informative and straight to the point. definitely subscribing and don't know why this is the first time for me seeing your work. highly impressed!

[@GarageBuiltHondas]

Thanks so much Rich, I try my best to help understand how to keep em running!!

[@gregsteward9638]

Amazing video, really all your content has been a game changer. I’m new to the world of car enthusiasts and just got an 88 ED hatch and your videos have already helped me a ton! Out of curiosity- do you have recommendations for which fuel pump works best for a 4th gen civic?? 🙏🏽💯👍🏽

[@GarageBuiltHondas]

I usually just grab one from the local auto parts store. I can't remember which brand AutoZone carries but that's generally what I use. Spectra maybe?

[@AnthonyJNunes]

Always great seeing your videos buddy. You are sharp my friend!! How did you gain your knowledge? I had someone do a head gasket on my 91 Si Tahitian Green, getting it back on the road. It was awesome the last few days. The shop also changed the fuel pump and relay so I thought I would be ok. Took it out to go to some body shops as my car needs a driver's side passenger. I pulled into the garage and parked. I decided I wanted to move the car and put the key in the ignition. All the lights went on but it would not turn over. Back to the drawing board buddy! Ugh!

[@AnthonyJNunes]

The front driver's side fender and outdoor rear view mirror is cracked. I got the mirror from ebay and am looking for the fender now. I see that there are a lot of after market ones out there.

[@GarageBuiltHondas]

I've never used an eBay set, but I would be willing to do so.

[@raymondgrell3569]

Great flipping video brother I just learned A LOT OF GOOD INFORMATION!!!!!! THANKS!!!!

[@GarageBuiltHondas]

+Raymond Grell Awesome man, glad to hear!!

[@pilgrimhere652]

You see when someone worked on a car before and notice the street hurry to patch and go style, 😎I'm learning, I changed a lot of things in my Son's 1992 civic" I called him today to finally tell him that it might be the Gas pump and filter,He bought another vehicle to then sell the civic very cheap,,like giving it away, but I took it home , It is a nice looking civic,,And watching your video, Im sure that is the problem.

[@GarageBuiltHondas]

It happens a ton on these cars. Cheap cars a lot of times equals owners who can't afford much. I get it, but it's not fun having to fix the issues sometimes.

[@xThe_Caveman]

Mad scientist strikes again good work Jon great video

[@GarageBuiltHondas]

+The_Caveman 👍😁

[@robertmuirsr9582]

Hey great info on civic I'm having trouble getting a 99 to start got spark any tips to check fuel pressure at the rail

[@richstar92]

Hey bro I got a 90 integra it turns on but bogs and has a solids check engine light on .also doesn’t pass 3k rpms

[@stevenmillard1985]

I appreciate the good information Now I know the 97 Civic trying to buy is gonna be an easy fix

[@GarageBuiltHondas]

Awesome!

[@OG_COOKIE]

thank you so much, my 90 sedan went through 2 pumps within a week because i had the wrong sock on it and couldnt figure out why. I guess now its time to pull the tank back out

[@GarageBuiltHondas]

It's annoying that these companies that make the fuel pump socks have incorrectly built ones that don't fit like OEM.

[@oscaralfredogavidiarivas8528]

good evening Sir, I have 1989 honda civic lx sedan 1.5 engine with dual points injection, I replaced my distributor, replaced both injectors primary and secondary, replaced sparkplug, cables, fuel filter, delphi fuel pump with the right sock, main fuel pump relay, the car runs good but suddenly spotting or skipping plus loose it power, specially when you are at light, the engine pistons compression is at 140 pounds are the cylinder, I need help figure out what is happening with my car. thank you for your great videos

[@russovangchang1267]

I just replaced my fuel pump and followed your other video showing us how to and now new pump is not priming and check engine light will not turn off cranks but won't start,I am getting voltage just not sure how much also got a new main relay

[@Mista808]

I have to replace the fuel pump on my 90 EF HATCH but the whole process of dropping the gas tank makes me feel like I can't do it, or atleast not by myself. My gas tank consistently shows around a half tank but then acts like it's completely out of gas and I've had this issue for a year. The fuel pump recently started whining the other day when I got up to about 90 miles per hour on the freeway ever since I've been babying it and it doesn't wind anymore but I know the fuel pump needs to be replaced.

[@GarageBuiltHondas]

It's really not that hard. It's not intimidating at first but actually a really easy job. Try it, you'll be glad you replaced it and the peace of mind is worth it!

[@VincentStevenson]

Hi Jon, thank you so much for these videos - they're super helpful! Can you let me know the exact make and model fuel pump that you put in? Have you liked the performance from them?

[@GarageBuiltHondas]

I prefer this setup now over any others. www.amazon.com/gp/product/B00MBI5C02/ref=as_li_tl?ie=UTF8&tag=jrw2018-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B00MBI5C02&linkId=c0f03133167ad6e6e48eb3281280d6f5

[@Ginger.K97]

@@GarageBuiltHondas does this fit directly in place of stock unit?

[@GarageBuiltHondas]

Yes

[@nrgNes]

hey, brilliant video, my civic b16a1, have been stoped for 15 years, and cant make the engine run (yet), can i measure the fuel pressure without having the car running?

[@GarageBuiltHondas]

Hopefully the fuel lines aren't clogged from sitting for so long. You can get fuel pressure without it running though

[@nrgNes]

@@GarageBuiltHondas ok, any way dont ear the fuel Pump working, gonna mesure volts and then Change fuel pump. Thx for the vídeo, great tutorial, and huge tips. Up, yp

[@GarageBuiltHondas]

👍

[@Freestoner707]

Good video man. Id suggest getting a Harbor freight tester they are only $20 and mine always worked good.

[@GarageBuiltHondas]

+Kyle Govan I think I'll get one for that price! It'll be a good tool to have in case I ever want to use one. I rarely use them and the rental option is nice.

[@Freestoner707]

Garage Built Hondas. Yeah I think it's worth it. You don't know when you'll need it and when you do you might not have the $ for the rental. Hypothetically.

[@Freestoner707]

I want to get a Walboro 190lph. I wasn't sure if the stock fuel rail could handle it but it seems fine after seeing you have used a 255lph.

[@GarageBuiltHondas]

+Kyle Govan true. 👍

[@GarageBuiltHondas]

+Kyle Govan I've had no problems at all, and most people go with this lph pump. It's great for future mods too as you'll be set up already.

[@organicvegan164]

I put a smaller sock with my performance pump and it works fine but it's good to know how it's suppost to go on

[@tommytom2414]

Do you have any videos for 88 honda civic dx hatchback ? Or is the crx basically same ? Because Mine isn't starting anymore 😕

[@GarageBuiltHondas]

88-91 Civic and crx are essentially all the same for suspension and engine parts.

[@kohlmannn]

I'm having the same problem with bogging down at more than 50 percent throttle. My motor is a d15b2 dpfi. I plan on doing a d16z6 swap but I'm just trying to get my current motor to run right first so that I can drive the car and move it if need be. I pulled my O2 and it was white. Will try a fuel filter and pump replacement since the z6 will need them anyways. My relay seems fine and my pump primes, but I haven't tested the voltage yet.

[@GarageBuiltHondas]

+Alex Kohlman try to do this fuel pressure test. It will definitely let you know how well your pump is working.

[@kohlmannn]

Thanks for your quality content!

[@GarageBuiltHondas]

+Alex Kohlman thanks for supporting and taking the time to comment, it means a lot!

[@vgrepairs]

My crx ECU fuse blows as soon as i turn the key to the ON position. i tried 2 ecu's and 2 diff main relays, blew a lot of 15a ecu fuses in the process, can't find out whats wrong...

[@GarageBuiltHondas]

Sounds like there's a short in the wiring somewhat unfortunate.

[@vgrepairs]

@@GarageBuiltHondas thank you for the reply man!

[@julnbev808]

Thanks for this video! I checked my fuel pump pressure and it read at around 28 psi. Disconnecting the regulator hose and the psi went to 38 psi. Would this be the reason for stumbling during acceleration in my 90 civic ex with only 90xxx miles?

[@GarageBuiltHondas]

Possibly especially if you can't verify if the pump is old.

[@julnbev808]

@@GarageBuiltHondas thanks man

[@GarageBuiltHondas]

YW

[@julnbev808]

@@GarageBuiltHondas so I replaced my fuel pump, regulator, filter, relay and tank and i still have only 28psi. Any idea why? Its running like I didn't replace anything.

[@XbenX0101]

Dude your videos are great quality.

[@GarageBuiltHondas]

+XbenX0101 thank you for that!!

[@journeyquest1]

The new aftermarket relay i bought was junk. I bought a fuel pressure gauge. It mounts above the filter. I think i bought the adapter from glow shift.Mini gauge was from summit.

[@donaldl6429]

Hi, great videos you have, very detailed and easy to follow. I’m trying to bring my ‘90 CRXsi back alive after sitting for years. After replacing all fluids, filters, dumping the old gas and putting a fresh gallon in, the car cranks but does not ignite. After a little debugging, I find the Alternator Solenoid fuse blows when turning the ignition to on. If I pull the plug to the fuel pump, it doesn’t blow. Also, the plug shows +12 volts when not connected. Pretty sure it’s the fuel pump, but trying to confirm if it is bad before doing the change. Also would replacing the pump assembly be advice or just the pump/strainer.

[@GarageBuiltHondas]

Spark is fine? Distributor works fine?

[@donaldl6429]

@@GarageBuiltHondas dropped the tank over the weekend and it didn't look good. Pump, hanger, tank was all rusted. The gas that I drained didn't have barely any sentiment and the outside looks clean so didn't think it was that bad. Anyway, put in the order for new tank and parts. Will see after I get everything back in. Your other video on the tank replacement was great. Exactly, what I had to do. Thanks!

[@donaldl6429]

Just an update. I got the new tank with new pump and sending unit installed over the weekend. Replaced the blown fuse mentioned above, the hoses looked fine so I re-used those. The car pretty much started right up. Thanks for these videos!

[@GarageBuiltHondas]

Excellent!

[@Philthese93]

As always quality vids! Thank you

[@Bigjamez2011]

When you pulled the fuel pump , it’s missing the rubber insert that sits under the pump and above the fuel pump bracket , the orientation is correct as that’s only way it can go on there is a simple that strainer aka the sock sits in .

[@Bigjamez2011]

Well unless the strainer is not oem I suppose could be the wrong orientation like you mentioned . I just replaced my fuel pump and strainer on my 88 crx si as it was bogging and stalling when coming to a stop . Turned out to be a bad fuel pump strainer was wrong one plus it was not attached properly , pump was good but replaced with a new one since I was in there and a new oem strainer. Also mine had a drain plug on the fuel tank so helped a lot and got a lot of sediments and deposits out .

[@GarageBuiltHondas]

I've noticed the aftermarket fuel pumps don't fit well usually with the rubber insert unfortunately and it's pretty irritating. I've had luck with a handful of aftermarket ones doing just fine though thankfully too! I wish all tank had the drain nut on the bottom.

[@TheJaimePowell]

Who made the carbon fiber gauge cluster trim? I made a handful of them for the 90-91 back in the day, (Ten By Ten Custom Carbon) but never saw anyone else producing that part. Looks good!

[@GarageBuiltHondas]

I'm unsure. This was a friend's car.

[@TheJaimePowell]

@@GarageBuiltHondas 👍🏻

[@tassap9355]

I'm having issues with my car now haha Just changed the battery and now after an humid day it won't start... It's freshly built too!! Imma check it up when it gets hotter.

[@GarageBuiltHondas]

Check the main fuel relay.

[@gavinenema]

Seeking Help for 91 CRX Si: I installed a new OEM main relay thinking it would get my car to start up. But, it didn't. When the car is in the ON position (under normal operation), I can hear the main relay click, followed by a secondary click that primes the fuel pump. Right now I am only getting the first click as the CEL goes off, and no secondary click, with no noise coming from the fuel pump. Apparently the fuel pump is not engaging. I was able to test & verify that voltage is being delivered to the fuel pump. Someone told me it could be a grounding issue, so I checked the ground wire connected to the thermostat housing, which was securely connected. Any idea if a bad ignition switch could have a direct correlation to the fuel pump not activating? Or is a bad ignition switch and a bad fuel pump two separate issues that may co-exist without being directly related to each other? I do have a Honda Service Manual, which is helpful, but because of my limited experience, I am not able to adequately understand the aspects of diagnosing electrical fuel delivery issues. I have followed the service manual test step to determine if there is voltage (10V) available when I connect the multimeter's positive probe to the BLU/WHT wire and the negative probe to the BLK wire of the main relay harness connector, then turn the ignition switch to the START position. I am not getting the 10V that the service manual says I should get, but only getting 0.03V. Does this mean the ignition switch could be bad? The engine does crank, it just doesn't start. I hope the information I have provided is enough for someone who can respond with a possible solution. I am basically trying to find out the following: 1. Do I have a bad fuel pump only? 2. Do I have a bad fuel pump AND a bad ignition switch? 3. Are the above two issues directly related, or are separate issues that don't necessarily correlate? Any amount of information & knowledge passed along would be greatly appreciated. Thanks.

[@marcoshoffner1738]

Having issues with my 89 civic will check filter and pump

[@GarageBuiltHondas]

👍

[@AdinSLaboy]

Thanks for the inf my friend also my car dies yesterday check main relay and smell bad I change it and the car dozens start the check power to the black and yellow wire no power take the fp out test it direct to batt and run super fast the n car dozen crank no more the green ligh key show out one's in a while I really don't now what else to do I swap ecu and still the same problem do u have any suggestions for me I will appreciate this its crazy issue

[@angeledgarsoto585]

Thanks for helping us👍

[@GarageBuiltHondas]

Youre welcome!

[@z1522]

What is not clear here, is how or when a slightly lower oil pressure actually makes any difference in performance. Poor fuel injection pulsing I can see as reducing combustion pattern and efficiency - but at what point is that actually a problem? If 25 to 30, or 30 to 40 psi is consequential, are DIY fans cranking up to 60 or 85, in the belief that higher is better?

[@kaloosh2639]

hi,GBH I have a problem similar with with this 90' honda on my 91' lx and will be going for a new fuel pump would you happen to remember the brand you bought or a brand you recommend to replace the old existing pump,and also are you any other social med. sites

[@GarageBuiltHondas]

Here's the pump kit - amzn.to/2lQ51Qr I'm on Instagram, same name as my channel here. 👍

[@victorfinngall3911]

1:10 - The Left Front tire is on backwards. It's a directional tire, you're not supposed to cross-rotate them.

[@GarageBuiltHondas]

I never noticed. Maybe he figured it out, I'm not sure.

[@newgunner1771]

You understood this wasn't even his car right? Don't try to knock this dude; cause he clearly knows what the fuck he is doing and I'm not just basing that off of this one video.

[@tonykartracer8032]

Wouldn't you want to test the fuel pressure at the end of the fuel rail? That would eliminate all possibilities of a clogged or faulty rail and injector o-ring failure?

[@rollthelosingdice]

When the relay clicks twice that means it's 100% good right?

[@GarageBuiltHondas]

Yes

[@pablosanty509]

I b swapped my ef with a conversion harness from mono tech. I was teaching someone to drive manual and they stalled. It wouldn’t turn on until after 2-4 key turns and giving it a bit of gas. Code 16 came up then went into limp mode, I turned it off then back on and the code was gone. It’s happened a few times. Mostly when running hot but never becomes a constant issue where I can’t drive the car. It always “goes back to normal”

[@GarageBuiltHondas]

Try a new main fuel relay. Kind of sounds like the issue.

[@pablosanty509]

@@GarageBuiltHondas thank you I’ll try it out!!!

[@jimmyribeiro7785]

Does it matter how much LPH the new fuel pump has? Like mine is fucked up i guess on my 99 integra type r. Which do you recommend? And whats the minimum LPH?

[@GarageBuiltHondas]

Any new replacement will be fine. I've been using some Denso ones from autozone lately and finding thr ones with a whole new assembly. You could upgrade to a Walbro which is one of the best. The lph won't matter, your ecu, rail, injectors, and regulator will only allow the proper amount. The larger lph that some support is only if you upgrade and need the additional fuel, then your pump csn support the demand.

[@EF1David]

So I bought a 1990 EF hatch and the gas guage doesn't work and it starts sometimes runs smooth and stuff but randomly starts any help the car randomly starts

[@GarageBuiltHondas]

Do a tune up. Also your gauge cluster of fuel level sending unit might be broke.

[@cplat__9753]

hey great video, maybe its the same for d16a9 motor? im having little issues to start the engine and when running, some irregular acceleration

[@GarageBuiltHondas]

Yes, absolutely!

[@chaleorta]

What could be the symptoms of the fuel pump strainer falling off? I replaced my fuel pump and once i put everything back together i saw that crush washer thing that holds it on. I didn't know what it went to until now lol

[@GarageBuiltHondas]

+EFsedan91LX lol, at least you know now! There really shouldn't be any signs because the flow will still be strong. It might start to dirty the fuel filter faster and you may have strained starting of the car. You also may feel like it's running out of fuel at 1/4 tank since the strainer won't be as low into the tank.

[@zacsnyder1937]

So how would you know if its the regulator thats bad?

[@dabgoddess3232]

Did we ever figure out why this car was bogging out im having the same issue my distributor and fuel filter are new and I have a check engine light. I'm throwing a code 1 code 17 and a code 20

[@GarageBuiltHondas]

It's in this video.

[@jesusmoya1575]

Very nice video man 👍👍👍

[@GarageBuiltHondas]

+Jesus Moya Thanks Jesus!

[@SIXXVS]

My 95 honda civic does the one click with the CEL coming on once then turns off but it only clicks once does this mean that the main fuel relay is bad. Someone PLZ confirm ! Im going crazy !!! My civic is a d15b7, 5MT,

[@jimhiscott2918]

I had to watch the second part of the red hatch mistory. I will be honest. I haven't watched it yet but I was thinking fuel pressure. I'll watch it now and see if my guess was right from part one...

[@journeyquest1]

If you run around all the time on an empty tank your fuel pump will be running hot and most likely will fail sooner. I try and run at least a 1/4 tank of fuel to help cool the pump.

[@ThatStevenLouis]

Facts! I keep mine between 1/4-1/2 at the minimum. I have a 94 Civic....$12 will take me from empty to half a tank and if I'm ever strapped and can't put at least $10 in it, I sit my ass down lol

[@gabrialsedin6342]

Hi there, I have 89 Civic Ef. My problem is when the fuel tank is full, it run fine. But, when fuel inside the tank drop almost empty( about quarter ) it doest run.. It's like no fuel pump into the engine. I bring it to a mechanic, even they can't solve the problem. Any suggestions.? Tq.

[@GarageBuiltHondas]

The fuel pump strainer is either the incorrect one or isn't in the pump anymore. Common issue is people put the wrong one on the pump when replacing it.

[@gabrialsedin6342]

@@GarageBuiltHondas tq for ur reply sir.

[@GarageBuiltHondas]

You're welcome

[@derrickjohnson12341]

What's the max amount of tq can those motors handle with stock everything?

[@batman9512]

The voltage drop from the battery to the fuel pump was a lot more than I expected. I was reading that the main relay in some older Hondas can add significant resistance to the circuit.

[@GarageBuiltHondas]

I'm not sure if you're familiar with CJs wiring but he makes an adapter to remove it and use a more common less expensive relay. Pretty neat upgrade!

[@batman9512]

@@GarageBuiltHondas I found the adapter you mentioned. Thanks. It appears that significant voltage is lost through the wiring somewhere between the battery and the main relay, also.

[@DougTheSnowMan]

Hey Man, got a quick question I can't find an answer to. I Have a 92 prelude, It's been sitting for 7 years and has over a half tank, engines out, is there a way to make the fuel pump continuously run without the car running? I want to pump it out with the fuel pump like you can do with a Mazda diagnostic port and a paper clip. Getting a fuel pump pig tail and make it run off a battery is the only way I've found so far.

[@GarageBuiltHondas]

Why not just drain it? Have you checked for a plug on the bottom of the tank?

[@DougTheSnowMan]

​@@GarageBuiltHondas It's more then 5 gallons and I only have a 5 gallon bucket. I'm working in my aunts 2nd house garage, so I can't have any spills of any kind.

[@GarageBuiltHondas]

I'm not sure then. You can experiment with applying power and trying to get it to pump. Hopefully the gas isn't thick and has not clogged the fuel lines.

[@sistercalhoun4444]

Do you have to soldier all fuel pumps? When you replace them because I don't know how to soldier. Is there a fuel pump I can buy that I don't have to soldier plug in?

[@GarageBuiltHondas]

Probably a stock replacement one. It's very easy to solder, and definitely something you should pick up.

[@kevmtz1901]

Hey Jon do you know what hood fits into a 90 Civic hatchback, I want to replace the hood and bumper filler, I'll appreciate your help

[@GarageBuiltHondas]

+Kevin Martinez All hatch and CRX are interchangeable. No wagon or sedan.

[@kevmtz1901]

Garage Built Hondas and the bumper filler from a sedan can be cut to fit the hatch? Or just the hatch will fit? Mine a little bend and I wanted to change it, but can't find a Hatchback here in Mexico in good condition

[@GarageBuiltHondas]

+Kevin Martinez Hatchback only, the sedan is flat because they have a small grill.

[@shadygrady80gaming]

Hey bud, what would be a good fuel pump to run on my 88 dx b16a swap. My fuel pump went bad

[@GarageBuiltHondas]

Walbro 255

[@IntegraDIY]

Excellent vid man!👌

[@GarageBuiltHondas]

Thanks buddy!

[@LionTribeBullies]

Are those Bbs RZ wheels, did you have to bore wheels to fit hub?

[@GarageBuiltHondas]

No idea. This was pay for work I did to someone's car.

[@turbo79civicbf]

How much should it be at when you put it on the first key before turning it on ?

[@GarageBuiltHondas]

I don't recall, it's in the video.

[@hectorgalaz2406]

Help... I just put an Ultra Street intake mani but it stumbles horrible on low rpm's after a hard pull... Some say bad injectors, others say I need bigger injectors... what fuel pressure should I have? My pump is a 255 Walbro

[@GarageBuiltHondas]

Might be a gasket not sealed properly.

[@keffboyaxb7800]

89 prelude 2.0 si. Replace fuel pump redid fuel tank due to rust inside. Replaced fuel filter. Car starts and idles fine. I try to go up a hill and it loses power. Going to do fuel pressure test but wondering ur thoughts. Tank was very rusty but i did it right so no rust in there or future rust. Also did a compression test and its fine.

[@GarageBuiltHondas]

Was it acting like this before you changed all the parts?

[@keffboyaxb7800]

Yes but it did help a little after cleaning gas tank

[@GarageBuiltHondas]

You may have some residual gunk in the lines themselves impeding fuel flow especially if having a bunch in the tank. If the car sits for too long the fuel can turn into a gel like substance and clog them up.

[@keffboyaxb7800]

K did pressure test. I'm getting 29 psi and when I pull pressure regulator I get 38. Still havent changed lines tho. Someone said to change pressure regulator? Thank you for helping

[@GarageBuiltHondas]

That sound ok. I doubt the regulator needs replacing. You can still try it. Are you sure it's a gas related issue? Maybe the distributor is stumbling?

[@sgaxdoomz5596]

Im having the samw problem it boggs like it feels like its not getting any gas ive replaced injectors fuel filter wires and plugs could it be my fuel pump?

[@GarageBuiltHondas]

Definitely. Rent the pressure tester from AutoZone and see what your pressure is.

[@spencersgarage]

Is there a way to test the fuel pressure with the car cranking but not starting?

[@GarageBuiltHondas]

Once you turn the key and the pump kicks on, you're gauge should automatically tell you where it's sitting. It'll give you an idea on how the pump is doing.

[@sashav6847]

hey man, i'm trying to check my Injectors right now, and am i'm wondering if i need to depressurize the fuel sytem prior?

[@GarageBuiltHondas]

Remove the gas cap, it'll help. You can also remove the fuel return line coming off the pressure regulator.

[@sashav6847]

@@GarageBuiltHondas nice i disconnected the fuel line POST filter and it didn't seem to help. i'll try that now. Keep it up man, I love these vids and the EF community is alive and well

[@sashav6847]

@@GarageBuiltHondas yeah no luck...i wonder if the rings being damaged eroded (my suspicion) is why they won't pull.... any other suggestions would be ace. thanks my man!

[@GarageBuiltHondas]

Won't pull?

[@dakine8083]

So I was looking up the location of the pcv for my car nd this video popped up. Maybe u could help me. I have a 89 civic hatchback dx with a d15b2 motor. Tryna smog my car but it wont pass. It runs rich at 15 mph but it passes at 25 mph. Already changes the coolant sensor nd thermostat but that didnt seem to work. Now my friend is thinking it could be the pcv valve

[@GarageBuiltHondas]

I don't know sorry. In Texas all EF's don't require smog anymore so I don't ever encounter having to worry about those issues. May want to start with a tune up and possibly a new cat.

[@danieldepot4090]

I put a new fuel pump not too long ago and it still does the same thing as you're describing where you give it gas and it kind of boggles and it doesn't turn off or stop it just you let go of the gas and then you push it again and it's back to normal what do you think it is do I need to put another fuel pump on there maybe the one I bought is defective

[@GarageBuiltHondas]

Maybe the filter is sitting incorrectly.

[@danieldepot4090]

@@GarageBuiltHondas like the strainer that goes in the tank

[@danieldepot4090]

@@GarageBuiltHondas I also just tested the fuel pump and I'm reading between 40 to 50 psi with out the pressure regulator vacuum line

[@GarageBuiltHondas]

Possibly.

[@Azura-qc5ml]

Hey man, great video!👍 I don't suppose you know the name of the wheels?

[@GarageBuiltHondas]

BBS wheel, no idea on the model though. It wasn't my car. I just helped fix it.

[@oscarcrx-9099]

I just swapped my crx with ls Vtec swap I rebuilt the engine and head relplaced pretty much everything . I got a custom chip with map and upgraded injectors . My problem is car will turn on but won’t stay on quickly shuts off . If I give it a little gas at start up and maintain it there car will stay on longer . There is no throttle response when I accelerate what so ever .

[@GarageBuiltHondas]

Fix any check engine lights first.

[@oscarcrx-9099]

@@GarageBuiltHondas I have check engine light on . Also my compression is at 154 on all 4 cylinders is this low ? The engine was not warm and I did not do it at open throttle. Thanks

[@GarageBuiltHondas]

Its fine. I'm sure the CEL isn't helping. Need to diagnose and fix that first.

[@yerberher]

Would u have any idea why my 1989 Civic Dx is only getting 120 miles per full tank? Already changed the fuel filter and air filter. 😭😭

[@GarageBuiltHondas]

Stuck injector. Might need new plugs and wires, maybe a new cap and rotor also. Those items can help with an efficient burn.

[@yerberher]

@@GarageBuiltHondas I’ll take a look at all that, thank u🙏🏻🙏🏻🙏🏻🙏🏻

[@ertatic3973]

Going trough this now with my y49 she hesitates on acceleration and when I took the vac line off the regulator it didn't even spike just like a line lol but will that pump and sock work for a crx aswell

[@GarageBuiltHondas]

Just buy a pump and strainer for your model whenever you order it.

[@ertatic3973]

@@GarageBuiltHondas im.getting it now that 255 Quantum pump and it comes with the fuel sock

[@GarageBuiltHondas]

👍

[@SIXXVS]

Bro sounds like he related to Chris Fix lol

[@mikescj2aownergarage488]

Need help my car stalls when it’s about reach normal temperature. I changed fuel filter , changed spark plug, changed fuel pump relay, when I switch on I hear fuel pump prime, clean the injectors, adjusted the valves, when the car stalls after 20 seconds I start it it’s fine then stalls again after few minuites. I’ll be checking fuel pressure soon. I’ll keep you update on that also I ordered new ignition coil I’ll also update you on that. The compression are all good .

[@GarageBuiltHondas]

Check the cat, might be clogged.

[@mikescj2aownergarage488]

I don’t have a cat

[@mikescj2aownergarage488]

Straight pipe from down pipe to the muffler

[@mikescj2aownergarage488]

I just just changed the fuel pump relay, I’ll change the fuel pump next and ignition coil. I’ll keep you updated. Thanks

[@galiks3908]

I've got a 91 Civic Si and am having trouble getting up, since bought it's got a new fuel filter and pump but anytime I give it any gas the rpm drops. Is it a throttle sensor I need?

[@GarageBuiltHondas]

Any CEL'S?

[@galiks3908]

@@GarageBuiltHondas after running for a bit it comes on

[@bonthor7515]

Did u ever get this fix? And wat was the problem?

[@galiks3908]

@@bonthor7515 yeah it was missing a fuel regulator or something like that, I just end up putting a screw in there to fix it.

[@bonthor7515]

@@galiks3908 putting a screw in where?

[@ChronosCards]

My fuel pressure is good, but if I turn the key on ON and don’t start it, the pump primes to about 35psi but immediately looses it and drop to 0. Is that normal?

[@GarageBuiltHondas]

It should slowly drop, not abruptly.

[@michaelissa9578]

I have same problem on my 1990 Ef I replaced pump and fpr but still have same problem... stumbling on acceleration past 50% throttle.. ecu bad maybe ? Or injectors on dual point system . Fuel pressure read at 44psi with fpr vacuum line detached any thoughts ??

[@GarageBuiltHondas]

No idea. May need to check spark and ignition related items.

[@michaelissa9578]

@@GarageBuiltHondas recently did spark plugs, distributor, starter and I had a shop recently put on a new cat and ever since then car ran good for about a week and then it died on freeway with check engine light turning on while power was lost then stalled. The car still runs but it will eventually die while idling after reaching operating temp

[@GarageBuiltHondas]

What's the light on for?

[@bonthor7515]

U ever figure the problem out?

[@MartinHernandez-ch5fv]

I need help the carborator drowns with gas, what can i do?

[@tatialo37]

Great vid! Isn't a 255lph too much for a stock motor? I thought it should be 180lph! I'm confused!lol

[@GarageBuiltHondas]

The fuel pump has the capacity to flow up to 255lph. A stock engine only allows as much as the ECU/injectors allow.

[@hondatuning2694]

Good video

[@GarageBuiltHondas]

👍

[@hondatuning2694]

@@GarageBuiltHondas I got the crx running good finally turned out the td41u dizzy is the one I needed the one I bought off Amazon wasn't working no spark so I bought another one and it fired right up did my fuel pump as well all stuff I have learned from your channel thanks for the great Honda channel

[@mrmadmike427]

Just got a tube up on my 86 prelude so I changed the fuel filter cuz it was hesitating till it hit 2 k well it say fir a while and the battery went dead and it won’t start I spay starting fluid it runs a d I hear a clicking in the dash where the relay is located so it may or may not still be working but the fuel pump still not working

[@bonthor7515]

U check the fuel pump fuse?

[@mrmadmike427]

@@bonthor7515 replaced fuel pump runs like new added 4oz of marvels mystery oil into gas too never ran better cleaned throttle body and the pcv valve too

[@Dillon1791]

I have the same test kit as you do in the video but my fuel filter service bolt is a 6mm thread and the kit does not have one that fits that.

[@GarageBuiltHondas]

Go to the auto parts store, they might sell the pieces.

[@Dillon1791]

Garage Built Hondas Hey thanks for the reply! This is what the car is doing. kzbin.info/www/bejne/iJK9Z2ODp76GoKc

[@Johnsondidit]

Very informative. Keep up the good work!

[@GarageBuiltHondas]

Thank you!

[@sistercalhoun4444]

Hey how much will you charge to do a Complete Brake System Job if I get my Honda to you I live in Texas? Please let me know?

[@GarageBuiltHondas]

What kind of work did you want done?

[@Elcoco_codm]

Garage Built Hondas what part of texas are you from? my car is sluggish when I step on the gas thought it might be my spark plug wires. About to check my fuel filter . I have a 1.6 zc swap on a 88 wagon

[@GarageBuiltHondas]

El Paso

[@ianbarber311]

So my fuel pump keeps running after turning the key. After a few seconds it gets louder. Swapped pump and relay, still same thing. After a few minutes of driving, it quites down. Sitting a t a red light it may make some noise. Pushing too much fuel.. Occasional noise. Old pump had over 300K on it anyway. Pressure regulator not working correctly? Or some wiring issue? Bad injector? No problem driving, runs fine.. just noisy pump, seems to idle high. Any comment appreciated. Don't want to stress out new pump.

[@ianbarber311]

new one seems to pulse with sound when cold, after driving and reaching operating temp seems to quiet down.

[@GarageBuiltHondas]

What kind of pump? Cheap generic replacement? I recently bought a running parts car and the fuel pump always kind of whines and makes noise. It's the first I've experienced like this. I haven't had issues with it, but I wonder if it's just defective and loud. Have you tested the pressure?

[@richardjoiner3482]

I just did this