i have just purchased a 94 camaro 3.4 v6 and it backfires going up steep hills and when i accelerate i have canged the plugs n wires prior to this problem, all wires are in place correctly, thinking of changing the coils or possibly the MAP. please help

 

have u scanned for trouble codes?

 

Get it scanned for codes to see what they are indicating the problem to be. Otherwise, you might get lucky or you might just be throwing away money on parts that don't need changine.

 

A friend had attempted to read the codes either her had a code puller and not a scanner or there. Weren't any codes, I'm not sure, looked like he had a paper clip or something he stuck into the plug, the service engine soon will come on after a trip on the high way for abt 15 mins or. So, the light was not on when he did the test, it got me stumped I work on nissans and this is my first chevrolet, and I've never worked on. A camaro and I'm getting used to it but I'm not familar with the issues these cars have, another thing is if I ease into the throttle its fine but if I punch it it falls on its face and backfires, I can feel it in the gas peddal and on the floor board on the drivers side I'm asuming because the exhaust pipe runs under there, any help u can throw at me would be great

 

Your computer is a OBD1 system the Paper clip does not work on those. take it to Autozone and get it scanned.

The term backfire is used for several different condition. Example: Expolding gas in the exhaust and exploding gas in the intake manifold. Exhaust backfires are normally cause by failed spark or to lean condition. Raw unburt fuel is dumped into the exhaust and lightup by exhaust from other cyclinders. The intake backfire is normally a Timing/ exhaust issue that can be cause by a plugged exhaust, a bent/sticking valve, valve timing, ignition timing.

You need to know what code the system is setting. My guess would be the code is a cylinder misfire and one of your coils is bad But it could be one of a hundred other thing.

Just a FYI, Coils and Map sensors are pretty good guesses. Because a bad map sensor can cause a lean condition underload.

 

paper clip will not work on a 94. need a scanner. stop by or call your local parts stores and see if they can scan it for ya.

 

Thanks will do ha, I work for advanced, and we only do obd2 testing so I guess I can try autozone, and. I did descover that vthe coil whire was not pluged in the whole way it stop much of the problem it isn't occuring all the time now just intermitintly and when it is rainly or humid it really acts retarded, should I just change all the coils for the hell of it? they are like a whole 30 buck each. Thanks for all ur imput and wizdom, ur guys are great