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2009 Audi A4 Quattro 2.0L Engine
Posted to European Engine on 3/9/2021 8 Replies

At idle only engine runs rough and has engine knock. Increase the idle slightly above idle and knock is gone and runs great. Is there an oil pressure check valve or controller for oil pressure that differentiates idle from higher RPM? Lots of reading, noth...

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car Vehicle Data

2009 Audi A4 Quattro

VIN WAULF68K79
Engine2.0 L / 4 cyl / GAS
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection
AffectedEngine
ConditionsKnocking at Idle
Open Help Request

car Vehicle Data

2009 Audi A4 Quattro

VIN WAULF68K79
Engine2.0 L / 4 cyl / GAS
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection
AffectedEngine
ConditionsKnocking at Idle