I'm kinda new to troubleshooting Mercedes gas engines. I was checking pins 2&3 on the round test point on the Left inner fender. I understand that Lambda is an active component of the CIE injection system.

Doing a static test on Lambda, I've come to realize that something isn't kosher with my car, not because of the rough idle, but becausae the static Lambda reading is way off.

So I'm looking for some input as to what effects the Lambda reading form the X11 connector.

When the throttle microswitch is opened, the Lambda reading changes to a closer, more better reading (I think, remember this is all new to me)

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