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1986 Mercedes-Benz 420SEL 4.2L Poor Idle Quality, Misfire
Posted to European Driveability on 5/23/2006 13 Replies

Hi everyone, Vehicle was presented to me with an extremely hi idle always and misfire on cyl #5 when engine is cold. Measured current to idle valve its about 900 ma at operating temp. I reduced the spring tension inside the idle valve by trial and error and go...

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  Related Documents & Media  1986 Mercedes-Benz 420SEL

 
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car Vehicle Data

1986 Mercedes-Benz 420SEL

VIN WDBCA35D2G
Engine4.2 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI
Emissionsobd1
SymptomsPoor Idle Quality, Misfire
OccursCold
Message Closed

car Vehicle Data

1986 Mercedes-Benz 420SEL

VIN WDBCA35D2G
Engine4.2 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI
Emissionsobd1
SymptomsPoor Idle Quality, Misfire
OccursCold