car is spitting and a sputtering....

[Kid Racer]

hello..any way my car is spitting and sputtering whne i hit 3,000 rpms or as some people have refored to it as braking down miss firing....any way i have replace the cap, the button, the plugs, the wires, and the coil..if any one has any ideal on this can u please let me know i have a 1991 z28 camaro tpi....

[deadtrend1]

what do you mean by you replaced the button?

How about ignition module? or fuel filter? Test fuel pressure at all?

[JerzLT1]

dont we have other forums for this? clogged cat? sometimes feels like a back fire if some exhaust is getting through but not all. itll sputter alot

[Brando56894]

:stupid:

check the cat