hondasrule wrote:
> Hello everyone,
> Im in need of help with my 1993 Accord EX. It is not passing smog for
> NOx. This is pointing to the EGR system so I started
> troubleshooting.
> I was able to get the manual off line and went through the
> troubleshooting diagnostics. Right now it seems all the system
> components are functional which is making it very hard to
> troubleshoot.
> This is what I have done so far: I have found that the EGR valve only
> opens for a brief moment when I rev the motor. I confirmed that the
> EGR Control solenoid is only getting voltage for the same duration
> that I have vacuum on the EGR. I performed all the troubleshooting
> the manual suggested EXCEPT replace the ECU/ECM. The EGR gave me
> changing voltage at the ECU when I applied vacuum to the valve and
> stalled the motor when applied vacuum. EGR good. I ran voltage to
> the EGR vacuum control solenoid and got about 6 in/Hg. Is this
> acceptable? I am starting to think that the vacuum control valve
> might need more flow in order to give me more of the 8 in/Hg the
> manual is calling for. What does everyone else think?
> The other thing I have not done is drive the car with the vac gauge
> connected.
> Does anyone have any thoughts?
> Thank you,
> -S
>
the valves are usually pretty reliable, so don't fret too much about
that. /much/ more likely, the ports are clogged. go to tegger.com and
look for his faq's on port cleaning.
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