Is CEL still on? If so what codes?

If you still have Code 9, I suggest removing connector B at ECU and measuring the CYP sensor resistance at connector B pins. Connector B Pins are 11 (Org) & 12 (Wht), and CYP resistance should be 700-1300 ohms for B1 engine or 350-700 ohms for B2 engine. If sensor resistance checks good and Code 9 is present, then ECU is very likely bad. That's what I did before replacing my ECU, which fixed the problem.

You need shop manual and reference connector B in Fuel & Emissions section.

good luck

 

THANK YOU ALL!!! Turns out it was the ECM after all. I could never have done it without your assistance! 2 years of troubles FIXED in an a few short hours! I'll be back! thanks.

 

Glad you got it and thanks for the update.

 

Thanks for posting your fix.

I used to think Honda ECU's were bullet proof since I've never seen a well documented post of ECU being the fix. However in last 1-2 yrs, this has happened several times, including to myself.

I suspect the problem occurs where the connector leads are bridged from connector to circuit board. Either of these solder connections offers possibility of fatigue failure due to thermal load cycling. Solder is notoriously poor in fatigue. I repaired my 94 EX circuit board but did not reinstall due to inexpensive replacement cost w/ used.

Regards