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Thread: Rough hesitation off idle in my 87 325is. ??

  1. #1
    Join Date
    Apr 2018
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    1987 325is

    Rough hesitation off idle in my 87 325is. ??

    Anyone know why or had the same problem? No engine codes or lights. Runs amazing other than it wants to stall right off idle and it smells like it's running rich on fuel. It's an early 87 model w the motronic 1.1

  2. #2
    Join Date
    Jan 2005
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    11/88 E32 750iL+98 E36M3
    moved from suspension forum to the right forum
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  3. #3
    richardodn's Avatar
    richardodn is offline Old Guy BMW CCA Member
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    20 440ix cab, 12 X3 35ix
    Hesitation just off idle is almost always a mild vacuum leak. It's actually running lean but misfiring so unburned fuel is coming out the exhaust. As revs climb the effect of the leak is masked by the total amount of air coming in.
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