hello i have a 92 firebird and i am have an issue with it it starts up and idles perfect and its great for the first half of the throttle but when i punch it it acts like its starveing for gas it sound like its gonna stall until you let off now i have given it a new fuel pump, fuel filter,cleaned the injectors, got a new intake all together,punched my cat thought it was clogged,new plugs and wires,and i just put a new coil in it now im only 17 so money is pretty slow and its pissin me off that i cant fix it my father owns an auto body shop so i can do everything myself just someone give me an idea of what wrong with this friggin car

 

by the way it is a 3.1L

 

could be throttle position sensor....maybe out of adjustment or bad. that would be my best guess.

 

did you actually put a fuel pressure gauge on it before you started replacing parts? Find out what it should be at and test the pressure.

 

i know it isnt my sensors because we have a computer and we plugged it in and it dont kick a code i replaced almost every sensor in the car
he told me that the oil pressure and everything is perfect but it isnt anything to do with electrical because the computer would have picked it up it has to be something on the fuel side and we cant figure it out

 

a bad tps may not set a code off. it'll just give a wrong reading to the computer. you have to check the voltage at it. do a search on here and you should be able to find what the voltage should be. I believe fuel pressure should be about 40 if you want to check it like krik mentioned.

 

The computer codes are near worthless, them computer are dumb as a timex watch. Never been helpful to me just costly as I chased my tail. Now 7-9 years later of no real help, and it now ubar pissed and won't give up the ghost. Im going carb.

Run in the dark with hood open, look for spark leak.

Do what other folks are telling you.

 

and rev it up when you do since the problem is when you give it more juice.

what kind of fuel pump? i went thru a ton of crap pumps that did that from autozone etc

 

i got one of the best pumps i could find on summit this is what i bought
http://www.summitracing.com/parts/VNM-HP745-200/

 

accually computer are not useless in most cases they save you tons of money because they can tell you exactly whats wrong this just happens to be one of those times were something funky is going on

and i did run it in the dark and its not arcing or anything so i know its not that

 

I'm having the same problem and to be honest with you I dont think its the TPS...I changed that out and I'm still having the same problem. I think my problem is the fuel pump because I think it was one from autozone lol....

but ya I dont think its the TPS, FPR, IACV, MAP, EGR, New Fuel filter, Air charge sensor, Cleaning out TB, New Air intake, Fuel pump.....Yup I did all this and the only thing I get is the camaro Sitting. It starts but when I hit on the gas it starts bogging then stalls out.

Been told that the catalic converter might be clogged....

Let me know what you find I'm very curious as you can see....

 

entrig00, did you check the timing? if yours bogs as soon as you hit the gas it could be a timing issue.

 

my cat was clogged up solid so i punched it out with a prybar i didnt seem to help so i was think maybe the distributer isnt advancing like its supposed to idk im sick of it

 

im not to up on the v6 but is it vacuum advance?

 

no, a 92 would be computer controlled. haven't had a distributer apart in a while but i don't recall any type of advance mechanism in it.

 

my car used to do the same thing, i replaced the fuel injectors and the idle air control sensor and it fixed that problem, also check your timing, make sure you unplug the electric timing control thing when you time it then turn car off and plug it back in

 

hey AM91Camaro_rs how did u get your V6 to run that fast!!!???? turbo? nitrous?

 

no power adders. It ran those times naturally aspirated. That was achieved with a big cam from crane, ported and polished heads, roller tip rockers, custom pistons/high compression, prototype intake manifold from www.McKinneyRacingProducts.com , headers, shift kit, high stall convertor, 3.73 posi rear end and a little tuning. I think the car still had a little more in it with some tuning but that was the best we got.

 

you think its the timing? Does it usually go out on its own? I thought it was the Ignition coil but that tested fine. Hey whats the difference it Pick up coil and Ignition coil....or are they the same?

Should I change out the Ignition Moduel?

 

pickup coil is a round thing in the dizzy that counts revolutions. You have to take the dizzy out and apart to replace it. IT basically replaces an old school hall effect.

Ignition coil is what provides the spark to your plugs. Easy to replace.

Ignition module says when to send the spark basically. It works with your ecm to control your timing. It is connected to your pickup coil.




Coils normally get hot and fail. Cool down, works again.
Module, normally get hot and fail, cool down, works again. Also possibly to start causing irratic timing and "jerking" while driving.
pickup, not sure of symptoms. But I would guess irratic timing, of flat no start.


If I'm wrong on this, someone correct me.

 

Perfect....ok from what your telling me I dont think i have a problem with any of my coils or modules....

now starting to think its my fuel pump going. I was told fuel pumps from Autozone goes bad, have you heard that? I bought this camaro from some guy who said that he had changed out the fuel pump....but I changed many sensors and cleaned out many things....now starting to think it is the fuel pump....

is it hard using a fuel pressure gauge?

 

There is a threaded valve on the fuel rail that you connect the gauge to. Go pick one up, connect it up, turn the key to run, but don't start and see what the fuel pressure is on prime. Start it up, check again, rev some and see if it's the same. Shut off the car and check take note of the pressure after the car is off. Check 20minutes later and see what it reads then. Post findings.


Also, I'm not sure on the 3.1 engines, but have you ever replaced the fuel pump relay?

 

I havent had any luck with any autozone parts. I very very rarely buy from them except gaskets.

 

You maybe on to something and I might have to do that. Yes there is a fuel relay but if thats out or going out I wouldnt hear the fuel pump turn on before I start the car. My camaro is having problem trying to stay on so starting it and rev it wont work for me. Never changed the fuel pump relay but thats something I have to look into. Do you know where its located?

Thanks nadster....

 

It's hit and miss. I've had my autozone fuel pump in my car for 4 years now, coming up on 60,000miles. Ignition Modules....now that's a different story.

 

On my '89 it's next to the master cylinder's power booster.

Looks like the attachment from the side.

btw, I doubt that's what it is, but it's still worth looking into. Some of the relays on my car are the same, you can simply move one or two of them around and see if that helps (though that can cause another issue if the one moved is bad )