B18B1 engine using (B18A1) PR4 ecu. No check engine light lit.
The only difference is the B16A Map & o2 sensor. The car runs rich and idles high
I connect the (B16A) PR3 ecu and car pulls alot better and doesnt smoke but still idles high.
Give me some imput..please.

 

Did you convert to OBD1? Is it a 1 wire or 4 wire O2?

 

1 wire o2 sensor.

 

anyone?

 

Check to make sure you don't have any vacuum leaks.