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Space cowboy, Did you throw any error codes when you finally installed the motor in your car and got it running? I installed one of Jakes bearings in my 1999 996 C2 and it went right in with no problem. However, I am having the same idle issues you mentioned. I thought it might be timing just like you. When I OBDII it I got error code P-1531 Cam Adjustment Bank I... short to short and the check engine light came on. So not really sure what it is, I suspect it could be the VarioCam solenoid or the cam position sensor on Bank I. I will be checking that tomorrow.
When I start the car, it starts right up but when it slows to idle it dies. If I keep the RPM up and bring the motor up to operating temp (180). It will idle at 400 or 500R RPM but not real steady.
I saw Jakes note on your post on throttle adaptation , so I will also try his recommendation tomorrow. The other term he mentioned I was not familiar with "handover". Thanks Jacke for your insight and thanks Space Cowboy for a great post. Bob
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