I have a 1988-89 DPFI HF motor out of a CRX installed in a 91 Civic I just purchased. The Civic is also A DPFI car. The entire motor w/FI system was installed out of the HF CRX. The computer was not swapped. The car ran like **** on the 91 Civic PM5 computer. The throttle body was swapped to help correct the problem. This didn't help. It currently runs really rich and stumbles above 4000 rpm because the current ECU is dumping tons of gas into the motor and bogging it out.

I have these questions:

Will the HF motor run properly if I swap the current DPFI HF intake and throttle body with the a 91 Civic system and run the PM5 computer?

Could I just put the smaller HF DPFI injectors in the 91 Civic throttle body? Would I still use the PM5 computer? Where can I find the 180cc/min HF injectors?

Would I be better off finding another D15B1 or D15B2 motor and use the HF motor as a boat anchor?

Please give me any input you may have.

Thanks.
Jeff

 

don't know what you have, but 88-91 CRX HF engine has Multi Point Fuel Injection, not Dual Point

 

I would have to second the fact that HF motors were Multi-Point, not dual. What is your engine code? D15B6 or something different?