I am having some trouble with misfiring in heavy acceleration. Just recently put a new exhaust system on it but i dont think that could be the problem cause this backfire is much different than the exhaust sound. Just got the plugs replaced about 10k miles ago and the programmer is not throwing a code. Any suggestions on what could be causing this?

 

COPs would be my guess.

 

Coils would be mine. Or Champion plugs.

 

What are COPs?

 

Coil On Plug

 

Coil Over Plug

 

Thanks Guys for the info pardon my ignorance.