I got a 95 EG 4dr with an LS swap in it. I was running a p07 ecu to hold me over til I got my PR4.
Now here's my issue when im driving at a constant speed sometimes it will act like its not getting fuel or spark. It will just bog down but if you hold the as steady or accelerate it will eventually stop and start moving out fine. I'm thrown for a loop on wtf this could be. This happens anytime I run a PR4 or P75 and both ecu's have been ran on my friends LS civics and they have no problems. Any idea's?? no CEL either

 

Forgot to add with the P07 it runs perfect

 

Did you check to se if there were any codes stored in th ecu, even tho the check engine light never came on?

 

The CEL lit up today it was a fuel injection circuit malfunction. i took the injector lock rings off anoher harness and the issue stopped but its got an o2 sensor fault now so it idles funny, im guessing becuase its running rich to compensate for the o2 sensor fault.

 

OBD1 ECUs don't store codes, that's OBD2 only. You may be able to display codes that don't show up on the CEL, if that's what you mean..