Installing in my 91 civic hatch. Setting up for OBD1, but I haven't heard anything as to if the PR4 or P75 ECU is better for the setup. Currently it's stock, but will be chipped and tuned later...

Please advise.

 

Bump advice.

 

will you be running a vtec motor or not??? pr4 is a non vtec computer i bieleve from the shortblock ls....

 

No, at least not that I'm certain. It's up in the air if I'll go LSVTEC or turbo LS...

For right now, I'm definitly not going to be running vtec. I thought P75 ECU was a non VTEC ls ecu from 94-00?

 

I'm almost positive the PR4 has the egr valve controls on it.

 

Good or bad thing?

 

yes the P74/P75 ECU's are from the OBD-1 B18B motors. I always thought the 4 was for the 1994 models and the 5 was for the 1995 models, but that just may be coincidence.