Looks like I picked a lot out of that innocent sentence.

I'm real sorry to hear such stories. I'm the first to defend other techs but I fear he is not working with proper diagnostic technique.

Which is a lot of what you are trying to find. The by-pass techniques here are acceptable but based upon this new info I would guess the OVP isn't the problem. The fact that you ran with the Lambda controller out to get home indicates the senario I posed and also indicated that the controller must be getting power.

You need to read my DIY article and bring what you don't understand to the table. Next stop EHA!

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