Smog numbers and diagnosis so far - Saab 9000 Bulletin Board - Saabnet.com
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Smog numbers and diagnosis so far
Posted by ben9kspg (more from ben9kspg) on Sun, 6 Dec 2009 15:31:29
In Reply to: No EGR, Marvin Stockman, Sun, 6 Dec 2009 06:59:09
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Here are the numbers:
15MPH
HC - Max:54, Ave:9, Measured:12
CO - Max 0.50, Ave:0.02, Measured: 0.16
NOx - Max 430, Ave: 57, Measured: 723 <-- FAILED
25MPH
HC - Max:37, Ave:7, Measured:11
CO - Max 0.47, Ave:0.03, Measured: 0.20
NOx - Max 717, Ave: 50, Measured: 785 <-- FAILED
My diagnosis so far:
1. Replaced Fuel Pump/Filter (failed a couple weeks ago)
2. Replaced Spark Plugs today (somewhere between normal and blacked, indicating it's running maybe a bit rich)
3. Checked vacuum hoses
Next on the list:
1. Back to factory ECU tune
2. Replacing both O2 sensors next week
3. Check ELCD Valve (don't know if this matters)
4. Ensure no blockage in hoses
Any other steps I should take?
Thanks all.
posted by 76.21.3...
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