My 1994 Chevrolet Camaro 5.7L lacks power and misfires.
Ok when I start up my car when its cold, the engine sounds great no misfires nothing bad at all, but when the temperature starts too increase the misfireing starts too happen and the temperature increases reading hot, I have no idea whats wrong with my Camaro, I bought the car from a guy that told me that all the car needed was a tune-up, and it turned out too be false.

 

I got the same problem with mine. What did you have to do to fix the problem?

 

It sure sounds like it needs a tuneup. How was it false? Optispark, plugs, wires, ignition coil module...

Did you find another problem?

 

Check fuel pressure.

 

The car had a general tune up done by a dealership by the previous owner. I have all the reciepts. What I found is that when you accelerate hard the fuel pressure drops and then will come back. That is what I believe is causing the misfire and serious power drop. The dealership told this to the kid who had the car but the kid didn't tell me. They put a new fuel filter on it.

Do you think it is most likely the pressure regulator or the fuel pump?

 

Are you running stock fuel injectors and no engine modifications?

 

The car is 100% stock with no modifications. has 114k miles near perfect interior. Its actually really nice for the year and miles. It currently has a full tank of gas so I really don't want to drop the axle to change the fuel pump.

 

change fuel pump 1994 fbody - Google Search

 

any news? did u fix youre chervolet?

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chervolet

 

It's probably his coil wire or coil that is corroded.

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