Quote:
Originally posted by Duke2.6
It's just a two pole SWITCH (open or closed on each of the two circuits - NOT a potentiometer)
The idle side should read closed (zero ohms) at idle and infinity when the throttle moves off idle. The WOT side should read zero at WOT and infinity at less than WOT. Your problem sounds like what I experienced.
Pay particular attention to cleaning the area around the throttle valve switch and the idle stop on the opposite side of the throttle valve shaft
This is from the "Model Year 1984" manual that describes the new 190 and its various systems. There were some changes to the KE system in later years, but I don't think the airflow pot/idle system relationship was one of them.
Duke
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Thanks Duke,
I agree the throttle switch on my car does not switch clearly either going to idle or going to full gas.
I cleaned already the area around the throttle butterlfly and improved a bit the idle (the picture was taken with everything removed).
Now I need to check also the adjustement of the idle stop. Does your manual indicate how to adjust the idle stop? I did move that screw some times ago and would like to be sure that I brought it back to nominal position.
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Keep us posted especially if your problem is solved
Present cars:
My car: E-class 420CDI, 2008, W211, V8, 180 000km
Wife's one: C-class 220CDI Sport Coupé, Euro, 2002, W203. 345 000km
Son's one: GLK class 220CDI, 2009, W204
Sold E class 260E, W124, 1988 beloved car sold after 489 000 kilometres of reliable services (engine M103, clutch and 5 speed manual gear box all original).
E-class, W210 320CDI, 2000[/B], 225 000km, Sold
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