Mechanics

VOLKSWAGEN PASSAT ENGINE PROBLEM

2003 Volkswagen Passat • 140,000 miles

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.
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Guest
March 22, 2013.




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
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Tiny
Exovcds
Mar 22, 2013.
May also be a vacuum leak at the booster, how are the brakes and any noise when you hold the brake down?

Mhpautos
Mar 24, 2013.

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