Hey guys I have been having problems with my 94 Camaro Z28. when I start it in the morning to let it warm up because its winter time here in Michigan. At around 4000 rpms it sounds like its missing real bad and back firing. as the car is running the missing and back firing keeps going as the rpm's drop. It'll keep doing this all the way down till about 2000 rpm. after about 15 mins and the car starting to warm ill give it a little gas and all the missing and back firing stops and the car runs great. If I try and drive it while its acting up the car studders as I give it gas. I don't know why its doing this and was looking for a little help on what it could be. id greatly appericate any help.

 

Did you scan for codes ? is the engine light on ?
GaryDoug has a sticky on here free scan 94/95 software

 

Not clear... you are warming it up (not driving it) and revving it to 4,000 RPM when all this happens?

 

I know where this is going...sounds like a res problem, but maybe my crystal ball is broken