gs-r94coupe

k so i have a 97 integra and i just put my swap in it and i go to start it and it cranks but wont start. i checked for spark and i have spark then i check fir fuel, no fuel at the fuel rail. fuel pump wont turned on. i replaced it with a brand new walbro and still wont turn on. can anyone help?

mouab18c1

iTrader: (5)

Check your fuses?

gs-r94coupe

i checked all of them all seemed fine. i dont know which ones control fuel tho.

mouab18c1

iTrader: (5)

Did the fuel pump work before the swap?

fcm

There are 3 fuses that "control" the fuel pump, [PGM-FI Main Relay]....

1- Fuse 24 - 15A (20A GS-R) hot in run and start] in SRS fuse block, [black/yellow]
2- Fuse 18 - 7.5A, [hot during crank to start only] in under dash fuse box, [blue/white].
3- Fuse 31 - 15A, [hot at all times] in engine bay fuse box, [yellow/white]

Fuse 1 is fuel injector relay control, [one side of relays coil] and main power for fuel pump relay.

Fuse 2 is "back-up" power for fuel pump relay control, [one side of relays coil].

Fuse 3 is injector relays main power and ful pump relay control, [same side of relays coil as fuse 2].

The PGM-FI Main Relay outputs are...

Yellow/black, injector relay output, [hot in run and start] powered by fuse 31.
Yellow/green, fuel pump relays output, powered by fuse 1, [hot when ECU/ECM supplies ground to turn relay on, green/blue lead].

Check the PGM-FI Main Relay... http://www.tegger.com/hondafaq/mainrelay.html 94

gs-r94coupe

i didnt know so i bought a brand new walbro 255 fuel pump and still nothing

gs-r94coupe

thanks ill go check in a lil bit

mouab18c1

iTrader: (5)

Since you replaced it with a new one and still nothing then your problem is not the fuel pump. Check what FCM posted. he's good with this stuff.

gs-r94coupe

i know its not the main relay cause im getting spark

fcm

The main relay, [PGM-FI Main Relay] controls fuel injector power and fuel pump power not spark. 94

gs-r94coupe

idk i just hard wired it

gs-r94coupe

this is soo annoying, so i hardwire the fuel pump straight to the battery just to see if the car will start, fuel pump is on but car does the same thing cranks but no start, have spark, checked all the fuses fcm told me too, but i will double check. i took off my fuel rail to see if my injector sprayed out fuel and when i try to crank it with the injectors out no fuel comes outta the injector but if i take the injectors out of the fuel rail it will spray every where. so it took off my fuel rail and cleaned my fuel rail and injectors put it all back on and did the same thing, then i tried diffrent injectors and still the same thing.

ive had soo manny people out here in the north west that have looked at my car that supposedly know every thing and they dont know why the hell it does this is there anyone that could help me please? or someone that lives out here can come look at this im out of money and stuck.

appreciate all sugjestions and will try every one of them that you could think it might be


help!!

racingcrx

this.

check with a good main relay. did the car run before you put the swap in?

gs-r94coupe

bought it as a shell guy said that his transmission was bad so he pulled the motor. hes a friend of my friend and he said that the car ran before

maximusej6

where you located? im in marysville and i might be able to come help... what kinda swap did you put in there? did you modify the harness at all? what model integra is it? and what year?

fcm

As I said, the PGM-FI Main Relay supplies power to the fuel pump and the fuel injectors, powering the pump directly will only get the fuel pump working, the injectors also have to work.

Try this, if you have not already, rewire pump properly, turn the ign. switch to run, not start, can you hear the fuel pump prime the fuel system, [run for a few sec.]?

If you do not hear the pump the PGM-FI Main Relay, [fuel pump relay] is not turning on, so it is a good bet the injector relay is also not turning on.

The injector relay supplies power to the injectors and a few engine valve/solenoids, it also supplies a 12V+ signal/power to the ECU/ECM, [two (2) inputs] if the ECU/ECM does not see power on those 2 inputs the injectors will not pulse, [fire].

With the ign. switch on, [run, not start] test for power, [12V+] at the injectors, [wire that is the same color on all 4 injectors, let me know what you find. 94

gs-r94coupe

i did alot of research and googled alot and almost every time fcm cam up and it seems hes helped alot of people. all the relays ive tried have been ones i had laying around the house. so today ima go out and buy brand new ones

riceburner700

check the valve cover ground, tranny ground and tstat ground, sounds like the injectors might be bad if you said it wouldn't spray anything out them and then when you removed them it would gush fuel out of the rail.

fcm

Most PGM-FI Main Relays that do not work are repairable, 99% of the time the problem is bad solder joints, easily fixed with a little 60/40 rosin core solder and a solder pencil.

http://www.tegger.com/hondafaq/mainrelay.html

Have you checked to see if you have power at the injectors yet? 94

gs-r94coupe

thanks for all the help guys ive solved the problem, had a loose conection under the dash and somone had put my fuel pump in backwards, and i had a loose ground. thanks for all the help it veryy much appreciated.

ramon90805

hey im having the same problem not getting power to my ecu, where was the loose connection under the dash???

gs-r94coupe

some ghetto electrical stuff before me, the guy before me put the alarm and the stereo in wrong so i got to re wire all that and just looking at the fuse box he had wires ran to it and stuff it was bad

gs-r94coupe

but now my tail lights quit working and my cluster lights

maximusej6

lame dude... that sucks..