SL/SLC-Class (R107) 1971-1989 : 250SL, 280SL, 450 SL, 380 SLC, 450 SL, 380 SL, 560 SL

SL/R107: Very High Idle

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Old 10-24-2010, 02:05 PM
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1983 380SL
Unhappy Very High Idle

I just bought a 1983 380SL. I am now having a high idle problem.
When cold it runs at about 1000rpm, when hot its well close to 2000.
I have been told it could be the Idle Speed Controller. Can anyone help with what I would need to do to get my car running right?

Also where is this controller?
Old 10-24-2010, 04:48 PM
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
looks like this

the valve
don't have pic for exact location on the m116
the valve could be the issue before the controller
could also be coolant temp sensor faulty
broken vacuum lines
a host of other issues
sorry don't know anyone up on the island that can help you.
Attached Thumbnails Very High Idle-0001411225.jpg  

Last edited by ohlord; 10-24-2010 at 05:01 PM.
Old 05-19-2011, 07:37 AM
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1985 380SL, 2003 S430
Very High Idle

Harley:

The idle speed air by pass valve (someone sent you a pict.), is located just behind the water pump on top of the intake manifold. One way to test this unit is to pull the elect connector off while the engine is running. If rpms don't change then this valve is not functioning. It could be the valve the idle speed control or something else. If I were you I would try to get my hands on a shop manual. I have one and can give you some info on how to test this unit if you want.

Lenny
Old 05-19-2011, 10:07 PM
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82 380SL 96 SL500
Online copy of MB service manual.

http://www.startekinfo.com/StarTek/o...tedDocId=11883

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