Thread: How do you Idle down RPM's on '86' 420SEL?
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Old 08-24-2001, 11:41 AM
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Mike Murrell Mike Murrell is offline
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Austin:

I assume you meant to say 1,100 rpm; not 11,000 rpm. You wouldn't want a 6,000 rpm idle either.

Check out the SEARCH facility. Key in FAST IDLE and only search the TITLE area for starters. There are many things that could cause a fast idle to include:

- faulty idle speed controller/actuator
- sticking throttle linkage
- TPS(throttle position sensor) out of adj.
- Vacuum leak
- Bad throttle switch
- Air plate position sensor

These a some of the possibilities.
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Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"
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