94 Fuel Injector system

I have a 94 lumina that hasn't run in almost a year, I checked everything and could not find the problem but just a few weeks ago somebody told me my fuel injector module could be bad. Now i have a 92 euro that i can swap parts on and see whats bad on my 94 so my question is where is the module and how hard is it to replace

some things to check on a car that has set:

1. does the fuel pump kick on when the key is turned to the on position?
2. If pump operates, does fuel reach the engine?
3. IF fuel is reaching the engine, is the pressure high enough?

most no-start problems on a car that sets is due to lacquer deposits from the old fuel mucking up the pump, filter, regulator, or injectors.

some things to check on a car that has set:

1. does the fuel pump kick on when the key is turned to the on position?
2. If pump operates, does fuel reach the engine?
3. IF fuel is reaching the engine, is the pressure high enough?

most no-start problems on a car that sets is due to lacquer deposits from the old fuel mucking up the pump, filter, regulator, or injectors.

The pump is working fine and i'm getting fuel to the engine. If i put gas in the air filter it'll start i've tryed just about everything and i still can't find the problem

Check all fuses/fuseable links? Like rich said, if the pressure is below spec, the injectors won"t spray. Was this car parked for all this time BECAUSE it wouldn't run, or it won"t run AFTER being parked for all this time? I'm not quite clear.

Check all fuses/fuseable links? Like rich said, if the pressure is below spec, the injectors won"t spray. Was this car parked for all this time BECAUSE it wouldn't run, or it won"t run AFTER being parked for all this time? I'm not quite clear.

I parked it becuase it had stopped running i just replaced the fuel pump and the it works fine and as far as i can tell i have enough pressure but it still won't start, I've put so many hours into trying to get it running and i'm getting nowhere i love this car and i don't want to get rid of it, I explained the whole thing to a friend of mine whos really good with cars and he told me to replace the injector module and since i have a car i can swap parts with i need to know where it is and what it looks like

I am not aware of any such part. There may be a RELAY for it, otherwise I believe the ECM has that duty.

Ok you said you put gas in the air cleaner and it started?? So the ign swstem is ok
Well you now know part of the answer. Its fuel or Injectors or both. You have to get a fuel psi reading I would bet its low very low. And as per the fuel injector relay there is none its run by the ecm (computer)
Fireplug

Ok you said you put gas in the air cleaner and it started?? So the ign swstem is ok
Well you now know part of the answer. Its fuel or Injectors or both. You have to get a fuel psi reading I would bet its low very low. And as per the fuel injector relay there is none its run by the ecm (computer)
Fireplug


I'm new to automotive work so i'm too smart with alot of stuff. How do i get a psi rateing

There is a schreader valve (just like on the A/C system) on the fuel rail that goes to the injectors. You use a fuel pressure gauge on that service port.

Is there anyway to clear the errors on the computer, With my 92 olds 88 i had to disconnect to battery and turn the lights on for 10 seconds then reconnect the battery to clear the errors and that made my a/c start working again, Will this same thing work on a lumina?

That, or remove the ECM fuses will do it, I think.

beffore you go any further, get your hands on a fuel pressure tester and find out what your fuel pressure is at the rail. You can buy an inexpensive one for around $35, and you should have 31-35psi with the key on and engine off. If pressure is low, pinch the fuel return line, and if the pressure shoots up, the fuel pressure regulator is bad. If it doesn't go up with the return line pinched, the new fuel pump is bad or the fuel filter(you didn't say if you replaced it) is plugged. IF pressure is fine, you have either an ECM issue or bad/plugged/stuck injectors.

beffore you go any further, get your hands on a fuel pressure tester and find out what your fuel pressure is at the rail. You can buy an inexpensive one for around $35, and you should have 31-35psi with the key on and engine off. If pressure is low, pinch the fuel return line, and if the pressure shoots up, the fuel pressure regulator is bad. If it doesn't go up with the return line pinched, the new fuel pump is bad or the fuel filter(you didn't say if you replaced it) is plugged. IF pressure is fine, you have either an ECM issue or bad/plugged/stuck injectors.


I didn't replace the filter but i've been trying to get that done, On the fuel rail after i turn the key on if i push the valve down fuel will shoot up i dunno if that'll tell you anything, I've put so much time into trying to find the problem on this car and i've really gotton no where and i reeally wanna get it running soon. I put some gas in the air filter yeterday and turn the key and it started right up and ran smooth and quite until the gas ran out then it died i know there gas in the tank and fuel getting thru the line but i don't know what happens after that

as little as 4-5psi will cause gas to shoot out the valve when pushed, so that's no indication of whether you have enough pressure. You need to get a presure reading before going any further.

as little as 4-5psi will cause gas to shoot out the valve when pushed, so that's no indication of whether you have enough pressure. You need to get a presure reading before going any further.


Is there a place i can rent one for free?? i'm really really short on cash thats why the cars not in the shop

I'm not sure if Auto-Zone has that tool on their free rental program or not, but give them a try.

JIM listen to me If you spray fuel in the throttle body and the car starts then the ing system is fine.
YOU HAVE A Fuel problem.
Fuel pump running?? Can you hear it with the key on for 3 sec. if not make sure the fuel pump fuse is good in the fuse block. Test for power back at the pump if you have power there and the pump does not fun then its bad
Fireplug

Fire, he said he has pressure at the rail, it sprays fuel from the schrader, but he hasn't checked the pressure yet, which is where I think his problem is (too low fuel pressure).

I've got a friend who may have a pressure gauge i'm gonna ask him tomorrow and see if i can check the pressure, I'll let you know what happens

I want you to do these tests
1. Before you try and start the car hook up the gauge and write down the pressure.
2. Turn the ign key to the on position and the write down the pressure reading.
3. now crank over the engine while watching the gauge and mark down the pressure while its cranking.
4. when it starts mark down the pressure.
5. While its still running mark down the pressure at idle.
6. No w I want you to rev the engine to 2500 rpm while in park and record the pressure.
7.Have some one get into the car and put it in drive with the ebrake on and there foot on the brake pedal and record the pressure.
8. Put back in park and turn off the car.
Every 3 min mark down the pressure drop.
post all the readings and I will check all day to see if you posted and get back to you.
Good luck
Fireplug