my friends 04 gto all of a sudden has a problem with his engine. the car all of a sudden has a choppy idle and he told me that its miss firing. i have not heard the car im going to hear it tomorrow. any idea what it could cause this problem. im thinking that maybe its a fouled plug

 

I am by no means an expert but, I would think fouled plugs come on more progressivly. I would of course check but also look at a MAF and all of the visuals first wires air leaks ect.

 

he said it started after he was doin donuts in a puddle somewhere so im thinkin its electrical