Owner of a '86 IROC-Z here, my first car and my first restoration project. It has the 305 TPI engine.
As of last night, the car broke down. We believed it was the fuel pump, but after replacing all three relays on the driver's side, the fuel pump has begun to work again. However, the car is now showing trouble code 34. We took the MAF sensor off and cleaned it, reattached it, and tried to start the engine up again. No dice. The fuel pump is working, fuel pressure is good, we have spark, but the engine will not start.
Translation: my car is showing code 34, and is not starting. Should i switch the MAF sensor tomorrow, or could there be another reason why the car is not starting?
Any help is greatly appreciated.

 

any help?

 

on a 86 tpi car code 34 means MAF sensor voltage is low.try to start it with the MAF unplugged,if it starts its the MAF.you could also have a ECM prob. i would also check the TPS voltage,you want .5 volts at idle or with engine off

 

Tried starting the car with the MAF unplugged.. didn't start.
The fuel pump is working, but the engine won't start and is acting as though it is starving for fuel. Checked the vacuum line for the fuel pressure regulator and it seems to be working fine. Have yet to check the TPS voltage, but will asap.
If there is an ecm prob,could it cause the problem with the engine?

 

checking the tps voltage, its low. at like 0.03 or so if i'm checking it right.

Definitely checking it right. its at 0.03.
the engine always sounds an inch from turning over but never can. it isn't the MAF, i believe.

 

yeah ,if the ECM dies .it will turn over all day but it wont start once.what are the codes you get?? code 51 is for a bad PROM, code 55 is for a bad ECM. it stands to reason that if you dont get these two ,your computer is ok.

 

the engine started once.. but it cut off during timing.
the only code we get is 34, even after resetting the computer.

 

the strong smell of gas has my dad thinking there may be a leak in one of the gaskets. would this cause the code 34?

 

well, in THAT case you need to replace the MAF.make sure the new one is plugged in securely at installation .do this;after putting it on ,disconnect the battery for a few minutes. then go start the car if no start recheck your codes and get back to us. ok?

 

did the car die while driving or, after being parked?

 

After being parked. It died when I tried to start it up. Now will not start with maf disconnected.

 

so, the fuel pump is turning on. You got spark. The MAF doesn't seem to be the issue. and, you're smelling fuel?

It might be way out of time. Does it backfire through the exhaust or through the plenum?
When I timed mine, when it went to far advanced, it died and didn't want to start back up.

If it's not in the timing, It's starting to boil down to the computer.

 

not backfiring, just doesn't start.
took off TB and the iac is stuck.

 

keyweights were set wrong, will reset timing tomorrow, maf sensor replaced, hopefully it will fire up.

 

the thing is, a stuck IAC valve will surely set a code.but you only get the one code for the maf ,right?

 

timing is set, still won't fire, new maf sensor etc.

 

reset the distributor rotor, which was pointing at number eight.
still doesn't run.
any help?

 

I am having the exact same problem. I have an '88 Camaro RS with the 2.8L PFI engine (LB8). The car drove great for 100 miles one day then I let it sit for about an hour and it hasn't started since. Replaced the ECU and PROM, replaced the MAF sensor... Still no luck.

Fuel is getting to the rail because it has around 43-47psi at the Schrader check valve. I too am also experiencing code 34 at all times.

I have injection pulse because I checked it with noid lights. Also has a new fuel filter, but all of this is didn't help a bit.

I will keep up with this thread and let you know if I was able to solve the problem.