Thread: Misfire under Boost please help!

14-15 PSI means is modded or very broken.

Mod list?

What brand/product line ignition products did you use?

EVAP leak and vacuum leaks are two different things.

If you have a vacuum leak that will cause fueling issues (see misfires) and/or lost boost depending on location of vacuum line.

I have a upgraded ECU, pulley, headers, CAI, full exhaust system with no CAT, but i have a chip for the no CAT and cooling system for headers. It says vaccum leak, to be specific. Yeah it sucks! it's a round about right now