I have an 85 vw golf. When I try to set the idle mixture my multimeter is pegged at 0ma regardless of how much the adjustment screw is turned. I am using a techtonics tuning test harness so I don't think its hooked up wrong. What could be causing this?
I would try here
http://forums.vwvortex.com/showthread.php?3070507
The thing is I am not getting any current reading when I hook the test harness to the DPR.
What if your meter reads a constant number, and doesn't fluctuate? The most common cause of that is: a bad oxygen sensor. What if your meter is hooked up correctly, but is pinned at zero? You car is set WAY, WAY too rich, and should be very sluggish to drive, and have no throttle response. Lean out the mixture slowly, until the reading starts coming up.
http://gtitoolbox.com/handbook/fuelmix.html
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