I have a 1990 integra with b16 swap and pr3 ecu wired in and had no CEL ever. i took out the pr3 and put a 1990 pm6 in it to manage my turbo fuel needs and it throws this code. its chipped with T.E and starts and runs but keeps throwing these codes. should i not worry?

 

Do you still have the pr3 ecu? pop it back in and make sure those codes are not there. Otherwise I'd probably ask this in the FI forum, or talk to leed

 

code 20: PM6 has an ELD, PR3 does not. your integra does not have ELD circuitry. once you're chipped, it will either remove this or not. no big deal, the ELD shouldn't throw a CEL. the PR3 connection for the PM6 ELD is the knock sensor. you may want to cut this, but do your own research before listening to me.

code 10: check the wiring for the IAT, the PR3 may be slightly different from the PM6. the wires seem to match up, but my pinout lists suck.

 

code 10 was my bad. forgot to plug back in after the injector install. it's ok now. the code 20 warric_k your right its the eld. no cel any more but ecu continues to throw code 20, so i can live with that :P