ok, been chasing p0300 (random multiple misfires) for about a month now, replaced plugs, wires, coil packs, MAF, got exhaust checked out, and today i took off the supercharger belt and the car runs perfect, ses turned off, misfires went away. its no good having a gtp if i cant run with the supercharger though. im thinkin it could be the map sensor. any ideas? thanks

Have you had a compression check done?

havent done compression check yet, i ordered a map sensor today, should be in on monday, i hope that fixes it.

check the vacuum hose on the side of the throttle body.
that was causing my P0300 code

all my vacuum lines look good as far as i can tell

the misfires came back with the sc belt off. could it be timing, tps, egr? and help at all is vastly appreciated.

check your injectors, maybe not seated right. I had the same problem. But I started to get my car tuned and it was gone. I think my powerlog had something to do with it. My mechanic said he thinks also the injector wasn't seated right since he installed new orings for me.