i put a b20b4 in to a 94 civic hatch. having problems. had this same motor in a 94 coupe. in the coupe it ran good. idle was perfect. and ran a 15.4 in bristol. swapped the motor into the hatch. ran it last week got a 16.0. lighter car whats the prob?? idle goes up and down from about 700rpm up to 2000rpm it goes up and down constantly. replaced all components around intake manifold didnt help. when check engine light comes on car runs perfect. when light is off it has major hesitation, acceleration is very sluggish. dont even feel power band. lights on feel very bit of what the motor has. power band and all. whats up?