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#1
11-04-2011, 01:27 PM
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w126 high idle
I know this has been posted about a lot but I'm stumped. I did a diagnosis based on the cd and determined the ICU was bad. So I replaced a few transistors tht were bad and it held the idle for a while but slowly over time high idle again. So I bought a used icu from my Benz part guy I go to and it worked for about 10-15 min and the idle went bad again. So this last time I checked all the diodes on the board, they seemed good, and replaced all electrolytik caps all ic chips and all xistors. Once again same problem. I'm stumped. I really doubt this prob is based on a faulty diode or cap tht I didn't replace but I suppose itds possible. Ideas?
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#2
11-04-2011, 02:43 PM
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You may be drawing in air somewhere.
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Mike Murrell 1991 300-SEL - Model 126 M103 - SOHC "Fräulein"
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#3
11-04-2011, 05:23 PM
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How would I check for a leak?
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#4
11-04-2011, 07:38 PM
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I don't see mention of which W126 you have - there are many.
Use the advanced search feature under search then look for high idle in titles only - tech sections - many hits. You might also search for fast idle
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Mike Murrell 1991 300-SEL - Model 126 M103 - SOHC "Fräulein"
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#6
11-07-2011, 10:05 AM
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Its a 1985 500sel
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#7
11-10-2011, 11:21 PM
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once again high idle issues 84 500sel - Benzworld.org - Mercedes-Benz Discussion Forum
85 500sel high idle - Benzworld.org - Mercedes-Benz Discussion Forum
__________________
Mike Murrell 1991 300-SEL - Model 126 M103 - SOHC "Fräulein"
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Linear Mode
