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  #33  
Old 04-04-2010, 02:13 AM
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slk230red slk230red is offline
WECO Installer
 
Join Date: Jul 2006
Location: Tampa, FL
Posts: 820
Quote:
Originally Posted by JohnM. View Post
The microswitch referenced above is located near the throttle linkage. It's a little black box about the size of a matchbook. It's got a little roller on one end. It's primary use is on de-celleration. It tells the fuel injection to cut off fuel when you let off the gas pedal. It's worth looking at, but probably not the root cause of any of your major issues.
Maybe not, but it will cause a low idle if it is not being operated by the throttle like mentioned in post #3. It was causing my low idle problem 400-500 until I adjusted the throttle so it was closed at start-up.

Closing the micro-switch at 3,000 rpm's caused the engine to saw, just like the manual states and the idle is at 700-750.
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1993 190E 2.3
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