Yep, thats right...when I put it in reverse the ecu throws a code 6(ECT). Turn the car off and turn it back on....no code. Put it in reverse the idle drops, tach bottoms out then bounces right back up then the cel lights up. The engine doesn't act like its going to die, just a quick drop in idle then right back...like 2 seconds. I also hear the main relay click when this happens. The main relay is about a month old (bought from Honda) and has checked out ok.

Any ideas?
91 CRX HF
b16a i/h/e
pr3
obd0
S1 Trans.

 

HF ECU received signal when back-up lights came on that increased the idle - go to ECU and cut the wire at pin B9 - should be green with black stripe - should fix the problem

 

Cool, thanks!