2003 VOLKSWAGEN PASSAT
140,000 MILES
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ANONYMOUS
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when i press the brake in drive or reverse the car starts to shake when i am on a stop light or on a red light but when i put it in neutral the car stops to shake what could be wrong it is an automatic transmission.
Mar 22, 2013 at 4:35 AM
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EXOVCDS
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Always scan for codes first (even when the "check engine light" is not on)... check "fuel trim" values with a scan tool (not every scan tool can retrieve them), they will tell you if the engine is running rich or lean.

Cleaning the throttle body and performing a throttle alignment / adaptation, can also solve idle issues.

Thomas
Mar 22, 2013 at 8:36 AM
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MHPAUTOS
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May also be a vacuum leak at the booster, how are the brakes and any noise when you hold the brake down?
Mar 24, 2013 at 12:31 PM