My 420 SEL just went through a major surgery as a result of the timing chain follower deal. After initial startup, the check engine light came on and they changed the O2 sensor. Now I have severe rough idle and at 75 can feel it in the wheel. I hope the solutions I've seen suggested to your problem work for me. The shop immediately wanted to replace the fuel distributor. Thanks. BTY, is the lambda harness just a "T" or does it have components in it? And will a digital multimeter work or does it have to be analog?

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Gregga
'89 420 SEL "Moby Dick"
'30 Ford Coupe
'31 Ford Slant Windshield Town Sedan
'33 Ford Pickup
'34 Ford Pickup
'01 Honda Passport