i have a 92 civic 4 door i put a d15b in and the idle jumps up and down between 1000 to 2000. the car ran befor i got it, the privus owner lost the key in the lower pully and it messed the valves all up so i bought it and droped the d15b in and the idle sucks..... any one with good details help me out, thanks

 

Check your IACV. The 92-95 Civic harness has very similar plug when it comes to the IACV. Lots of people messed up plugging in the wrong plug for the IACV and the idle will go bad.

Check your wire harness plug for your IACV. Make sure there is no other plug near the area that can fit. Let us know. Good luck.

 

I'm having the same problem I'm putting the d15b in an ex ek. stock ex ecu d16y8 dizzy d16y8 intake manifold. my idle jumps the same.. any help? will a p28 help? should I go p08? anything will help. thank you