like i said the car runs fine after about 4000rpm's anything before that it missfires and sputters unless it's at full throttle.and this is after i put a 2000 civic si throttle body on the car.before it just had a map sensor hanging with no vaccum line and it would run fine at low throttle but would backfire at full throttle so by changing the throttle body it just switched the problem instead of fixing it.

any help sorry if it's hard to understand..just ask me anything about it.

 

please help i need a car to get to work.