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  #1  
Old 13th August 2007
90734x4 90734x4 is offline
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Join Date: Aug 2007                                                
Location: Cleveland Ohio
My Saabs: 1989 Saab 9000 turbo 105,000 miles
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Default Lots of oil pre turbo

Hi I am the owner of an 89 saab 9000 with a FPT. This vehicle has failed its emision tests with twice the NOx levels it should be putting out max.

During my inspection i noticed there was alot of oil pre turbo, in the tube that runs from the maf sensor to the turbo.... what would cause this???

Thanks
Matt
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  #2  
Old 13th August 2007
Jim Mesthene's Avatar
Jim Mesthene Jim Mesthene is offline
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If you aren't using oil or have very smokey exhaust, it's normal.
If your only symptom is high NOX, you probably need a catalytic converter.
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  #3  
Old 14th August 2007
Mysticle31 Mysticle31 is offline
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Cat Cat Cat. A new cat and 02 can mask lots of stuff.

I even think that sometimes particulates and things in the exhaust pipe can throw off smog readings just a touch. I had a 77 Ranchero, I installed new cats myself and passed well, then I installed new pipes and passed better!
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  #4  
Old 14th August 2007
Norman Lovie Norman Lovie is offline
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Default

A bit of blow by on the turbo compresor, as jim says if there,s not a lot of smoke then no issue

but the oil can coat the coil on the maf sensor throwing out your mixture,
try giving it a spray with carb / elec cleaner.
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