Excessive smoke from exhaust at stop sign/light - Saab 9000 Bulletin Board - Saabnet.com
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Excessive smoke from exhaust at stop sign/light
Posted by Ravi [Email] (more from Ravi) on Tue, 27 Feb 2007 11:12:03
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All:
I notice the following problem with my 97, 9000CSE, 2.3l, 4-cyl SAAB, 135K miles, automatic transmission.
When I start it and drive it - after a short while if I wait at a stop light/sign - with my foot on the brake pedal - I see excessive smoke from my exhaust. If I slide the transmission shift lever into "N" then I see a slight reduction in the amount of smoke. When I am driving I don't see that much smoke - but that simply might be because the smoke is diffusing away quickly.
Almost 2 years ago I have had a head-gasket job done; my turbo pressure seems to be just fine (I am making these comments because they appear to be the culprits from reading other posts).
I have clean spark plugs; I have tried the STP fuel-injector cleaning solutions - nothing has changed. I have checked the PCV valve/line - seems ok.
What are the potential things I should be looking out for. 5 years when I bought this car, it had 64K miles and I would get 30 miles on the highway; now it has 135K miles but I get only 25 mpg. Am I simply losing gas and hence a fuel-rich exhaust?
Thanks much for your help!
Ravi
posted by 192.35.4...
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