750i, Motor ruckelt ab 100km/h

[Erich]

Originale Felgen und Reifen drauf?
Advanced BMW ABS hints and tips
ENGINE APPEARS TO MISFIRE OR STUMBLE INTERMITINTLY
MODELS AFFECTED:
5 Series(E34), 7 series(E32), 8 series(E31) all equipped with ACS.
FAULT:
Under certain specific conditions an apparent engine misfire or bucking may occur. This is not an engine misfire.
CAUSE:
Short (less than 100 milliseconds) fuel injection cut-off, as a result of MSR (engine drag torque control) regulation. This is a normal ASC function that may occur under these conditions: -The vehicle is equipped with ASC -Vehicle speed between 45 and 60 MPH -A rough road surface (e.g. potholes, railroad tracks) -Light throttle(accelerator pedal only depressed 1/8) -ASC not switched off.
SOLUTION:
Replace the ASC control unit. no further diagnosis of the ABS/ASC system should be necessary.
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ABS, ASC, AND ASC+T MALFUNCTION
MODELS AFFECTED:
All models equipped with ABS,ASC OR ASC+T
FAULT:
Any of the ABS ASC and ASC+T systems inoperative, intermittently inoperative, or illuminating the warning lamp.
CAUSE:
All BMW'S with slip control systems use 4 wheel speed sensors which monitor each wheels speed of rotation with a high accuracy. The system control unit uses this information to calculate a vehicle speed. In this way it detects wheel speed variation. If the inputs vary from each other by a certain amount, the control unit is not able to do the calculation reliably (plausibility fault) and takes its self off-line as a safety precaution(fail-safe).This can be because the wheels and tires are non-approved partsand therefore do not agree with the system.
SOLUTION:
Make sure the vehicle is fitted with BMW approved wheels and tires. Then do further diagnostic testing to check if fault is resolved.

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