No, that one is for diagnostics, specifically setting the injection
timing with the dynamic tool.
The one for the idle speed/tach is on the rear of the engine reading
off the flywheel.
Interesting. Thanks again. We have a 87 124 300D that has a
completely wacko idle. Everything I've tried makes no difference. I
think the tach also goes wacky with the idle. But when I unhook the
idle speed electric connector on the pump it does the same wacky idle
thing. I never thought of looking at the tach/instrument cluster
as Dan suggests.
Is there some other connection between the hall effect
sensor/tachometer to the throttle or idle speed control that would
work with the EDC unhooked? (I think EDC is the book term for the
electronic idle speed control plug on the top of the IP.) It sounds
like a flakey signal from the sensor would cause this, but I don't
understand how it could work with the plug on top of the IP
Next time I see the car (probably 6 months) I will look for this
sender and connector at the rear.
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