Thanks for the replies guys. I was beginning to think a while back that my vacuum was a symptom of a different problem.. Thats why I removed the exhaust.

I have to order some new plugs, and I think I have a good cap and rotor from a spare car just in case.

Just to refresh, checking the duty cycle is pin 7 and 11? After the car is at operating temp?

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Eugene

10 E63 AMG
93 300te 4matic
07 BMW X3
14 Ford F-150 Fx2