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What color is the smoke? White is coolant, blue is oil, black is unburned fuel/carbon build up.
Check the spark plugs. The insulators should be a dark yellow to orange color. Bright Orange/Yellow to white indicates a lean fuel/air mixture, while brown to black indicates rich mixture and/or oil burning.
While you're at it, check the intercooler hard pipes. Turbos like to leak oil.
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Cliff Hipsher
'87 944 India Red
'86 951 Kalahari Metallic
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