Volvo AWD 850 Forum

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850 Wagon lots of smoke!! Help 850

posted by  Taifoon on  Wed Jul 8 06:18 CST 2009
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last visit: Wed Jul 8 19:14 CST 2009
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My 850 wagon with 91K miles suddenly is smoking and looks like its running really rich! It was perfectly fine and it suddenly started smoking yesterday like crazy and was running rough. Is there an easy way to identify if its a sensor or something like that? ANy help is truly appreciated!! Thanks!! I don't know much about the 850s, had 240s for years and now not sure how to identify the problem.








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    850 Wagon lots of smoke!! Help 850

    posted by  KlausC on  Wed Jul 8 06:44 CST 2009
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    last visit: Fri Oct 24 10:15 CST 2014
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    Black, blue, or white? White is a headgasket. Blue is oil. Black is gasoline.

    If it is black, your fuel pressure regulator probably died. Check the vacuum line from the FPR to the vacuum tree, it is a clear line and should be clean. If there is gasoline in the line, the FPR needs to be replaced.

    Klaus
    --
    Common sense trumps a PhD







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