The car is a tropic 1998 v70 t5m with 215,xxx miles, tinted with 18" IPD Nebulas. Runs like a champ,have a few mods including a snabb intake pipe,ARD TUNE,dry flow filter,IPD HD TCV,and an obx turbo back arriving Wednesday. Also have most of stage 0 done (plugs,wires,cap,rotor,fuel+air filter)Also new vaccum lines. after the tune up the car was perfect for about a month or two then came the CEL, P0300 random/multiple cylinder misfire,and also codes for cylinder 2,3+4 misfires as well?!??!?!. Regapped the plugs and checked everything over, light went away for a few drives and is now back and as Im typing car is in my garage for another check over. Car still seems to run great but annoying CEL is kind of scaring me with multiple misfires. Next step is to probably get a MSD coil and see if that helps. Any help would be greatly appreciated.