ok so i have an 04 gtp comp g, on my way home from work earlier i stopped and got some gas. i bought 93 octance as usual from shell. i noticed if i floored it afterwards occasionaly my car wouldnt shift and would kind of stutter. so right before i went home i floored it again to possibly diagnose it and see if it did it again. not only did my car not shift but my check engine light started flashing and when i looked under the hood my exhaust manifolds were red hot for about 20 seconds. does this sound like a to lean or rich fuel mixture or a clogged cat?
