got a 93 camaro with a 3.4l and every now and then it backfires out of the intake tube. it has no power it wont rev over 4000rpm's it has no power at all. i put a new tune up on it, new map sensor, new tps sensor, injector o-rings, new crankshaft sensor, and intake plenum gasketthe ses light is not on. any suggestions? could itbe a clogged catalytic converter?

please help im 16 tiredof working on it just want to drive it.

 

Sounds like it.