Ok i just recently swapped in a b18a1 into my 90 crx si and everything went smoothly. I put in the pr4 ecu out of the integra, everythign out of the 91 integra and used my stock si wiring harness and everythign fit properly, no left wires. I have fuel and a yellow/orange spark but the car doesnt want to fire. I have checked out the grounds and cleaned all the surfaces, and there is even no check engine lights. I have no more ideas on what exactly could be wrong. any help is greatly appriatiated. thanks alot ... chris

 

go it running but now it has a 2000-3000 jumpy idle, bounces around alot. any ideas?

 

Just curious as to why it wouldnt start in the first place?