yea i was wondering ..i have a b16a2 swap in a eg and when i put on the p28 it show check engine but when i put on the chip p28 ..check engine turns off...but how come when i put a chip p30 in there ..it kick hard but check engine stay on...should i put the chip p28 or egnore the check engine?? should i have anything to worry about ..tahnks for the help

 

oh and what car does a p30 ecu come off of???