Failed emmissions High HC
cpcycle at earthlink.net
Tue Jul 27 15:52:19 EDT 2004
Well gang I now have a challenge to solve.
I could use some wisdom on where to start on looking for the cause of my
high hydrocarbon output
193ppm with a 120ppm max at low speed (801 rpm) REALLY BAD
103ppm with a 140ppm max at high speed (2568 rpm) not good but passing
I found a message with a couple of things to check
1. O2 sensor ( new 9/02)
2. Check and clean injectors
3. Replace/clean spark plugs ( new 9/02)
4. New cats. ( new 9/02)
What kinds of codes would I be looking for when I down load them?
I also read something about a temp sensor that could cause the ECU to go
into certain modes by its failure.
91 200 tq 20v Avant
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