Misfire under Boost please help!

**Aaronfrom** · 02-20-2013

Hey bro, im not overly experienced with super chargers, but i do know a fair bit: does your exhaust sound different than usually? you might have a clogged cat causing there to be too much exhaust being forced back into the engine. i would HIGHLY recommend stop flooring it, drive it very cautiously with rpms, you do not want to much presssure in the engine it could cause: engine blowing (worst case), seals broken, head gasket blowing, cam misfunction, valve seal forced the wrong way, and youre probably sucking way to much fuel.

**TexasTanker19kilo20** · 02-20-2013

Originally Posted by Aaronfrom

Hey bro, im not overly experienced with super chargers, but i do know a fair bit: does your exhaust sound different than usually? you might have a clogged cat causing there to be too much exhaust being forced back into the engine. i would HIGHLY recommend stop flooring it, drive it very cautiously with rpms, you do not want to much presssure in the engine it could cause: engine blowing (worst case), seals broken, head gasket blowing, cam misfunction, valve seal forced the wrong way, and youre probably sucking way to much fuel.

full exhaust system with no CAT

Post #4

**Blaine Beast** · 02-20-2013

Yes as pointed out above I don't have a CAT it's a straight 3' down pipe to the y pipe then flowmaster mufflers, so you can rule out the cat, The exhaust actually helps being so loud cause you can hear when its misfiring, Also when Im in park I will rev the RPMS up to about 4000 right before the supercharger starts to kick in and you can feel and hear the car vibrate and studder so I dont know if that gives any one else a clue of what it could be. I just replaced the ICM as well so the whole ignition system has been replaced now I'm just itching my head of what else....