my 92 Saab 900S failed low idle emissions w 239 of 220 ppm but passed high idle
What is your question?
my 92 Saab 900S failed low idle emissions w 239 of 220 ppm but passed high idle w 94 of 220 ppm. what would cause this problem and where would i start in terms of correcting this problem (repairs)
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hard to say from here but 2 suggestions.
replace the plugs and o2 sensor.
change the oil and filter.
beyond this, you need a shop to diag it for you.
Roy
Plugs/wires/distributor/rotor and oil are fairly new, O2 sensor has not been changed will try that, thanks
fairly?? how long is that?? Roy