Hey Guys,

I finally got my '91 M103 idling after chasing down a major vacuum leak. It's still idling like crap, but that's the subject of this.

Duty Cycle in closed loop is 99% (.1v). I've checked most sensors etc and most check out ok (O2, OVP, AF pot, EHA, EZL, etc). I attempted to adj the lamda tower to make the car run richer. After as much as a full turn the DC would get up to around 45%, but the computer would trim that out & take it back to 99% in about 10sec. Oddities:

1) The Throttle Switch was testing wonky the other day, but tests fine today. That or I wasn't operating properly.

2) ***EDIT: Temp Sensor tests fine. I was testing it from the actual sensor instead of @ the EZL. Tests w/in spec now as well.

Is there anything that I have neglected to test? Any ideas as to what might be wrong?

Thanks!

(EDIT: Just tested the coil as well & got proper resistance btw 15 & 1. FSM says to measure resistance btw 1 & 4 as well, but neglects to tell me where the hell #4 is... Don't think the coil is bad anyway...)

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Currently:
1972 350SL Euro 4spd
1973 BMW R75/5
1981 BMW R80GS
1995 FZJ80 with OM606 Conversion In Progress