fuel pump wont prime
 

aigh im lost is there a fuel pump fuse? lol. any other ideas.

it will turn over but not fuel. i think its sparkin cuz there was fuel and it ran for likea half second but without the pump no fuel.

Re: fuel pump wont prime
 

what car?

The manual for my integra says fuse 24 is for the fuel pump. It goes through the main relay too so check that.

Re: fuel pump wont prime
 

fuel pump relay?

Re: fuel pump wont prime
 

look in your mauel, or on the internet ::) its mostlikely like stated before, a fues, or mainrelay...

Re: fuel pump wont prime
 

im going to say main relay and i would almost bet on that too. if it is a civic/crx/delsol

Re: fuel pump wont prime
 

or prelude. You can just pull the main relay out, and solder the points when u pull it out of the plastic case. I soldered mine and it was obvious that some of the points had cracks in them from getting hot. My ---- used to stall at lights, and wouldn't start for about 10 minutes.

If u have a multimeter, check power going to the pump when you turn the key to the ON position.

My vote is main relay.....BTW they're all the same for obd1 honda's

I say DL the service manual for ur car.

Are you sure ur getting spark....u said u think u are.
Pull out a plug and put it in a wire and watch while trying to start the car.

Is there gas in ur tank?

Re: fuel pump wont prime
 

and im gonna say relay for the win.

Re: fuel pump wont prime
 

did anyone mention relay yet?

Re: fuel pump wont prime
 

i doubt it is the relay.i have 2 of them and tried both. same thing no prime. i checked my fuses. the pump primed befor i switched harnesses so iunno. ...

Re: fuel pump wont prime
 

well, maybe your pump is out. more info, what did you do before this started happening.

did it happen all at once or did it intermittently start to go out.

Re: fuel pump wont prime
 

t-stat ground

Re: fuel pump wont prime
 

wtf are we psychic? I thought you meant you went out one morning and the car didn't start so something failed, not that you changed the engine harness and the fuel pump won't work.

Re: fuel pump wont prime
 

yeah, what he said^^^^^

Re: fuel pump wont prime
 

bad ground on the sending unit

Re: fuel pump wont prime
 

sorry its ben a few since i could get to the car. takin over the family bidness that is 2 months behind on rent is hell.blah.

anyhow.

car is a 96 civic dx. had a d16 in it and i swapped in a ls. didnt have a obd2 dizzy to begin with so i just rewired wat i had. car would start and just idle and wouldnt rev past 5k. thought it was a checksum so i reburned numeros chips to make sure it wasnt. still no run anygood. so i was like i know my harness is hacked up prety good so i will just save cash and buy a new harness for a dx since i dont need vtec and buy a obd2 ls dizzy to finnish it off. 3 months later everything is bought and i get around to installing it all. put in new harness and dizzy put in some obd2 injectors. i havve a few plugs left unplugged but i have nothing else to plug them into. so then car wouldnt even start. wtf. turns out i grounded the starter power wire to the frame. undo that and hook it to battery then car cranks and runs for like 3 seconds and cuts off. hmm yay i thought. try to restart car but it only turns over. hmm then o think did i here the fuel pump prime. nope i didnt. so from here i am lost.

i do know the main relay is good the ecu is good. and htere are no blown fuses that i know of. i have checked every one that i can find. lol. i do know the fuel pump worrked 3 months ago.

i dont know wat it is. i have tried 2 ecus that i know are good and 3 main relays htat i know are good. i think im just gonna run a wire to the fuel pump to a accessory and see if it primes.

fixin to look thru the manual on my laptop also.

Re: fuel pump wont prime
 

either that or the pump. and at least it not an EF or DA its a 96 so you dont have to drop the tank. so your problem should have been solved a while ago :6

Re: fuel pump wont prime
 

yea some one said main relay like 30 times. its not the main relay. i got one of my friends car that we know works because he tried it on his car then gave it to me. ihate electrical ----.

wat i did to fix it for the time being was run a wire from an accessory to the fuel pump but that didnt help to much becasue now i get 58 lbs of pressure and hte car runs rich as ---- and wont rev.

if yall seriously think its the mail relay some one mail me one they know is good i will pay shipping and mail it back when i get done with it or if it does fis the problem i will pay u. but really wtf is up with the damn thing. the fuel pump worked fine with the old harness.

Re: fuel pump wont prime
 

grounds

Re: fuel pump wont prime
 

It's pretty simple man, everyone says main relay cause that's what controls the fuel pump. If your main relay works in another car, and your fuel pump works with a jumper, then that leaves the wiring to the main relay, fuses, or maybe your ecu as the culprit. Usually people forget a ground when they swap ---- like harnesses or engines etc.

I downloaded a manual and it has a step by step procedure to diagnose the wiring, grounds, and fuses. Do the same and come back with what fails the test. I planned on typing it out but it's two pages and I'm behind on work today.

Jumpering straight to the fuel pump is a lazy hack for a probably simple fix.

Re: fuel pump wont prime
 

i have checked the grounds a million times. the ecu i know works. i just found the pinout for the ecu so ima ---- with that later. u should copy and paste that walk thru laater for me cuz im a lazy ----

Re: fuel pump wont prime
 

ok so i think the porblem is the conversion harness. one wire is wrong and it just happens to be a fuel pump one. will post pics later., i hope thsi is it. lol

Re: fuel pump wont prime
 

youd think you woulda checked that 4 months ago when you made this thread

Re: fuel pump wont prime
 

lol i know rite. but ---- i didnt know that dude would ---- with me like that.. i will find out later if that is the problem.

ok thats not the problem i looked at an old conversion harness i had that worked. well they matched up cept for one wire that the new harness has that the old opne doesnt. oh well. back to searchin.

Re: fuel pump wont prime
 

Is there a separate fuel pump relay or is it just the main relay that runs the pump? Jumper harness, wiring, relay(s) are what i would narrow it down too.

Re: fuel pump wont prime
 

yea so i suck at life lately.

checked the main relay to see if there was power foing to the fuel pump from there or if it ws getting power more so.

as i goes pin number 7 the fuel pump one on the main relay isnt getting power. so i guess that is the problem. not to figure out were to go from here. schematics are in my near future.

Re: fuel pump wont prime
 

ok so everything i look at has the srs unit and hte fuelpump ---- on the same paths.

well i removed all my srs ---- but in a half assway. could that be the problem?

ok so 7 is for the srs ---- and 5 is for the fuel pump.

Re: fuel pump wont prime
 

safety check on the srs circuit possibly. airbags don't show, so car assumes theyre blown and disables the fuelpump.

seems logical, but i don't study fuelpump wiring schematics from cars for a living

Re: fuel pump wont prime
 

that is wat i am thinkin also. the only problem is that it crunk up 6 months ago like this but with a different wiring harness. maybe that is the reason it would only rev to 3k then.

all i know rite this second is that the fuel pump does indead work and the car idles just runs rich as ---- on 58lbs of pressure and that when i put an acc. wire to pin number 7 on the main relay the fuel pump works then to but also at 12volts witch im sure isnt good for it.

im going to search the net for the srs circuit safety check.

Re: fuel pump wont prime
 

3k rev is limp mode

Re: fuel pump wont prime
 

limp mode? new to me. i was told it was prolly just the chip had a check sum but it did it over and over.
with the fuel pump hooked up to an acc. wire i got it to rev to 5k but it thats it and it will hardly do that.

how many volts does the fuel pump run on. i know its not 12 lol cuz then u would have hella fuel pressure like i got.

i just wanna get this ---- fixed.

Re: fuel pump wont prime
 

voltage doesnt dictate fuel pressure (unless its low), the regulator/return line does

Re: fuel pump wont prime
 

well i put a fpr on the rail and i couldnt turn down the fuel pressure nor turn it up. its a 58 lbs and says its gonna stay there lol.

Re: fuel pump wont prime
 

aftermarket of oem? If aftermarket try running an oem unit.

Re: fuel pump wont prime
 

exactly how halfassed did u take out the ABS stuff? did u actually remove stuff...or did u yank and pull on it?
I never knew if the bags are blown it'd prevent the car from starting.

I wouldn't totally rule out the wire harness as the culprit...seein how that's what was changed when this started happening.
Some ppl really hate wiring, and i hope u don't mind it....cuz it sounds like its a wiring problem u got....but u probably figured that out already

wiring diagram....here u come

Re: fuel pump wont prime
 

---- its ben a week with no hmt ----. lol

well got to checkin some ---- just goin back to bassics.

first the tps sensor was reading backwards. makes no fukin sence to me but it was. got that fixed.

now i notice that the check engine lite isnt comming on at all. i know it did about 2 weeks ago buit now it doesnt..

im pullin everything out next week and checkin it all.

im goin g to have a lot more time to ---- with it as i just started a new job workion 4 10's at w.w. williams rebuilding allison tranny.s

so maybe i will figure this ---- out, ---- i know i will.

will post updates as i get them.

and thnks to everyone for chiming in.

Re: fuel pump wont prime
 

good luck and remember KISS (keep it simple stupid)

It always ends up being something dumb..... :S