[nicholas6706]

I'm attempting to fix a persistent n52 idle vibration. When the rpm's drop after stopping, it will hang at ~800rpm for a few seconds before coming back down to 600. I've smoke-tested the intake and there are no vacuum leaks. There are no engine codes. I've replaced the following (all OE spec):

• Entire engine (spun crankhub)
• Eccentric shaft sensor
• Valvetronic motor
• Throttle Body
• 6x sparkplugs + coils
• All gaskets (Oil pan, VCG, OFHG, TB, intake manifold)
• 2x vanos solenoids
• PCV system
• Engine mounts
• 2x o2 sensors
• 6x injectors
• Crankshaft pos sensor
• Camshaft pos sensor

Any help would be appreciated.

[rothwem]

Originally Posted by nicholas6706

I'm attempting to fix a persistent n52 idle vibration. When the rpm's drop after stopping, it will hang at ~800rpm for a few seconds before coming back down to 600. I've smoke-tested the intake and there are no vacuum leaks. There are no engine codes. I've replaced the following (all OE spec):

• Entire engine (spun crankhub)
• Eccentric shaft sensor
• Valvetronic motor
• Throttle Body
• 6x sparkplugs + coils
• All gaskets (Oil pan, VCG, OFHG, TB, intake manifold)
• 2x vanos solenoids
• PCV system
• Engine mounts
• 2x o2 sensors
• 6x injectors
• Crankshaft pos sensor
• Camshaft pos sensor

Any help would be appreciated.

Shit man, you've basically done the whole car. Could it be in the transmission? Any difference between neutral and drive?

[nicholas6706]

Originally Posted by rothwem

Shit man, you've basically done the whole car. Could it be in the transmission? Any difference between neutral and drive?

Yeah it's pretty frustrating. Unfortunately no difference in any of the gears.