Actually what I should have said is listen to Alan. I missed the the Lambda voltage as I was thinking adaptation values for some reason. The thing is pegged rich on Lambda.

Which does validate a bunch of what I was saying. The voltage drop on the cylinder #1 is undoubtably from the rich condition.

Spark plug wires are NOT the problem. Does it have a misfire???

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician