Does the check engine light stays on when the ecu is bad??

http://www.superhonda.com/foru...de+23

 

what codes are you getting?

 

I have a 97 obd2 GSR motor in my 95 hatch; I ran the motor with JDM and USDM obd2 p72 ECU without getting any check engine light.
I want to use an USDM OBD1 p72 ECU for smog purpose, but I'm getting code 23 , the problems could be knock sensor/ECU/open wire circuit.

I have read on here from other posts saying, "Blah blah blach...most of the time the problem is the knock sensor". Common sense dictate that the USDM OBD1 p72 ECU is messed up. What is your opinion on my situation?

 

have you tried running another ECU? try that, and if you get no codes, you'll know what your problem is

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nicko360 &raquo;</TD></TR><TR><TD CLASS="quote">have you tried running another ECU? try that, and if you get no codes, you'll know what your problem is</TD></TR></TABLE>

yeah, I have tried two other ecu with out getting a cel, but both are not obd1 p72 ecu.

https://honda-tech.com/zerothread?id=1853426
From this post I don't think my obd1 p72 ecu is tossed.