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  1. #1
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    Member No: 175789 22james is an unknown quantity at this point 22james's Avatar
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    running ruff , and missing

    hey wondering if i could get some help figuring out this problem, i have a 83 733i manual.the motor runs smooth for the most part but there is a heavy smell of unburned gas, and it has a hard time reving past 4000 rpm, seems to be down on power as well.Just wondering what would be the best things to start checking first. thanks all.

  2. #2
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    Member No: 58142 ROYinGA is an unknown quantity at this point ROYinGA's Avatar
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    Might check the fuel pressure regulator among

    other things and ask over on bimm erboard dot com e23 also.

  3. #3
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    Member No: 6343 luquette is an unknown quantity at this point luquette's Avatar
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    Check FPR, fuel lines, injectors...

    If you smell fuel, there is likely a fuel leak somewhere. I had a small rack on the return fuel line that you couldn't see, but when the fuel pump was running, it spit out a large volume of fuel into the engine compartment.

    Start up the engine and ope the hood. You'll probably find it quickly.

    Good luck,
    Christopher
    1985 745i
    Las Vegas

  4. #4
    WillOO[][]OO
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    Re: running ruff , and missing

    Idle control valve? Mass Airflow Sensor?

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