i have a 90 hf crx whith a b16 swap. every time i put a pr3 ecu in the car it acts weird. when i put the car in reverse the check eng light comes on and you smell gas pretty bad.so i run a stock pwo and the car runs fine.why's that?

 

depin wire B9 at the ecu all hf crx's have a wire there that goes to the reverse light depin it and your good........and you'll still have reverse lights