i just bought a 90 civic 4 door ef.
It has a b18a1 motor with aftermarket cams dont know but will found out.
And it runs like crap. Runs very rich
wiring looks messed and its also obd1 and found out that it has a pt3 ecu???
A obd1 ecu from and accord.
and this Ecu be chipped and causing the car to run like crap?

 

anyone? what ecu should i run?

 

PR4 ECU. They come in obd0 and odb1 varieties. A 92-93 integra ECU is what you'd want if the motor is obd1. If you wanted to redo all the wiring with an unmolested obd0 harness from another obd0 civic, use the 90-91 integra ECU.

 

yes i am planning on fixing up the wiring in my car. They even used integra fusebox idk people nowadays.
will be searching full cabin harness and switch to obd0.