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I may have found the answer in the FAQ 200 1990

posted by  Mark Lundell on  Fri Sep 24 02:03 CST 2004
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last visit: Sun Sep 14 21:34 CST 2014
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A couple of months ago my 240 started running poorly and my miles per gallon dropped. I replaced the Fuel pressure regulator and O2 Sensor with no change. I brought it to the area volvo "expert" who changed the plugs and wires and made a few adjustments. It runs a bit better but still not great. MPG is still down. He said "It is strange, the codes say it is running lean, but it is actually running rich."

Now I think finally found the right spot in the FAQ under electrical connections. It looks like the mechanic could have quoted the FAQ. I will be checking (maybe just replace) the ground connections for the injectors tonight.

Wish me luck! This has been a pain.








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    I may have found the answer in the FAQ 200 1990

    posted by  darius on  Fri Sep 24 02:34 CST 2004
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    last visit: Sat Sep 20 19:24 CST 2014
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    Good luck! Consider your engine coolant temp sensor. Mine was bad and the symptoms were similar (running rich, black smoke from the tailpipe, very bad MPG, etc.).
    --
    Darius in Albany NY '86 744 GLE (175K, given to my mother-in-law); '91 745 Turbo (174K-my 'Little Red Wagon'), '00 Toyota Camry (65K - my wife's transportation appliance)







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