I have a 1989 Pontiac firebird trans am gta (sorry thought I should clarify) and have been working on this problem a while I recently replaced the fuel pump and got fuel pressure and tested spark I'm getting that and the injectors are pulsing but the car still won't start, It starts with starting fluid but then dies after your done spraying the starting fluid please help me

 

Did this car sit for along time ? Old multec injectors?

 

yes the car sat for a while but not sure how long mabey a few years and I’m not sure if they are multi tec fuel injectors but I tested each one for resistance and they all have 14.8 except for one, one did have 16.9 but other than that I think the fuel injectors may not be pulsing what should I do?

 

I would suspect the injectors are varnished shut. They need servicing or if oem replaced. Contact @southbay08

 

He has another thread with a video of the car cranking and firing off starting fluid and pics of the injectors. They aren't RP Multecs.

Crank but not start - Third Generation F-Body Message Boards

 

The only thing I seem to be missing is pulse in the fuel injectors it’s either the fuel injectors aren’t getting power or something’s stopping it from spraying now I don’t think they’d all just stop working but lemme know what are some possible solutions

 

Get a "Noid" light to verify for certain whether it is or isn't getting fuel injector pulse.

If it is not, have you checked the fuses "Inj 1" and "Inj 2" in the fusebox? Since you say the fuel pump runs it's likely that the fender mounted fuse is OK. 1989 is a car with VATS, have you checked whether the VATS system is functional? The fact that it cranks with the key (and runs with starter fluid) could mean that someone in the car's past has jumped the VATS starter relay, meaning that with a malfunctioning VATS it could still crank but not pulse the injectors.

If they are getting a pulse with the noid light perhaps they are all gummed up from sitting, or (highly unlikely) maybe your fuel has gone so stale as to not be able to burn?

 

I had assumed by your first post this was checked with a noid light ?

 

I had checked for pulse and voltage but mabey i didn’t do the noid light correctly but when I work on the car I’ll see but I checked voltage on the injectors it’ll get 12 volts when the key isn’t in but when the key is in and turned to the on position the volts will drop to 0.12 in that area of volts so I don’t know if that a good test but on another note about VATS theirs no security light on the car that turns on when the key in turned on and it cranked before we jumped the starter relay so I’m not sure how else can I rule out vats?

 

Oh and yes I checked the injector fuses their good and the fuse to the fuel pump is good as well

 

Just because the security light is off doesn’t necessarily mean the passkey module is sending a 30hz signal to the ecm. You still have some troubleshooting to do.

 

so to rule out vats should I try the resistor method or get a vats bypass module which one would be easier

 

Check injector pulse, then continue to diagnose. Bypassing a key reader may not be the answer.

 

okay I’ll do that and I’ll get back to you on either Wednesday or Thursday and just wanna say thank you all guys for really putting an effort into helping me with this it means a lot

 

Does my car have a ECM relay near the fuel pump relay or just anywhere on the car ?

 

The ecm doesn’t have a relay it’s doesn’t draw much amperage

 

Okay I just did a noid lights test I put the two wires into the injectors and cranked and the light wasn’t flashing at all I checked each injector no light flash

 

Do you have a vom with a hz setting ?

 

I don’t know what that is but I just tested a fuel injector cylinder 1 with 12 gauge wire and had my mom cranking and cylinder 1 was popping like she wanted to run so the injectors are fine what does a vom do?

 

A con swindles you , a volt ohm meter you can test the frequency signal going from the passkey module to B6 or the ecm. Where you manually pulsing the injectors to get it to pop ?

 

run me through step by step how to test the pas key module cause I don’t see one near my dash or near the ecm but I have the ecm out of the dash OH and yes I was manually pulsing the injector with my mom cranking it sounded awesome man I’m so excited can’t wait for this for bird to Roar!!!!

 

A con swindles what does that mean hahaha oh btw here’s my number just in case your available on the call
9253534613

 

The passkey module is burred in the dash. At the ecm it will be mark pin B6 key on and cranking should be 30hz at 50-60% for the ecm to enable the injectors. If it’s not working properly the handshake sort of speak will not happen and no injector pulse. A few ways to bypass if that’s the cause.

 

What if I unplug the pass key module or whatever or does the ecm need to get a progress report from the pass key if so what can I do to test and see if the pass key is the problem

 

The ecm gets a 30hz signal to enable the injectors. Amazon timer shop has a hz modulator or can get your chip tuned.