1994 Camaro V8 Problems

[jcm1689]

ok my v8 camaro has been having some problems lately. basically when i start it it sounds like its cammed. if you get on the gas at all the problem gets worse. if you get on the gas all the way it goes up to about 1200 rpms starts sputtering and almost stall and after about 2 or 3 seconds it will backfire. after this happens the rpms drop really low, the check engine light comes on, and then the car runs normal until i shut it off again. anyone have any idea what the hell this could be??????

[loburbon]

i had that same problem with my iroc-z and it ended up being the ecu. but it can come from many simple things like the maf sensor. run a code scanner on it and see what the check engine lite is showing

[ChevyBoy]

i had that same problem with my iroc-z and it ended up being the ecu. but it can come from many simple things like the maf sensor. run a code scanner on it and see what the check engine lite is showing

x2 thats what i was gonna say. run up to advance auto parts and tell them to scan it.

[Big P]

Could be any # of things. You need to hook it to a computer and see what trouble code its tripping. Its running like normal because when the check engine light comes on the engine management goes into closed loop and doesn't use the sensors to run.

[jcm1689]

Could be any # of things. You need to hook it to a computer and see what trouble code its tripping. Its running like normal because when the check engine light comes on the engine management goes into closed loop and doesn't use the sensors to run.

the closed loop thing your talking about makes sense cause sometimes the engine light comes on once it starts sputtering and stuff and fixes the problem before it backfires. well idk if this makes sense but if it goes into a closed loop like your saying i figured if i unpluged the m.a.f. sensor the check engine light would come on and shut off the sensor? well i tried this. the check engine light came on i drove around the block but still does the same thing as before

[civichatch]

K i had exact same thing happen wit my civic. It was my map sensor. Its running rich.

[jon_570]

the closed loop thing your talking about makes sense cause sometimes the engine light comes on once it starts sputtering and stuff and fixes the problem before it backfires. well idk if this makes sense but if it goes into a closed loop like your saying i figured if i unpluged the m.a.f. sensor the check engine light would come on and shut off the sensor? well i tried this. the check engine light came on i drove around the block but still does the same thing as before

"closed loop" is when the O2 sensor reaches 600 degrees ferenheitt(spelling) before this time it relies on the look up tables of the PCm to determine how much fuel it uses.. once it reaches "closed loop" when the o2 sensor reaches 600 degrees it uses the o2 sensor to help determine the amount of fuel.

i would GUESS.. do you have throttle body injection. if so check if you have leaky injectors. my friends had this problem it would sound like it had a huge cam lope on it and we hooked a timing light upto sparkplug #1 and shone it on the TB injector and we could actually see it leaking through the timing light.. it was hella sweet.

[basshead]

start out simple it could be as easy as a clogged fuel filter i had the same prob in my 95 Z-28 and it turned out to be my filter

[Big P]

It could be any thing it needs to be scanned. It might be the fuel tappits but i doubt it because it will still miss a bit when the check engine light is on. It also will seem to clear out at higher rpm. If one would be stuck in the closed position you would have those symptoms i just said. Having one in the open position would cause the engine to flood and even could cause damage. This is probably a very simple fix. It needs scanned first tho.

[dwright27]

sounds like injectors to me.