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1986 Mercedes-Benz 420SEL 4.2L Poor Idle Quality
Posted to European Driveability on 4/21/2011 7 Replies

Long story, I wont go there. Bottom line is this engine will not idle if TPS is connected, found that if I unplug TPS it will idle very high. The TPS switch test to specs. so I started looking for what circuit causes engine to stall at idle and found if I disc...

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  Related Documents & Media  1986 Mercedes-Benz 420SEL

 
Message Closed w/FIX

car Vehicle Data

1986 Mercedes-Benz 420SEL

VIN WDBCA35D4G
Engine4.2 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFuel Injection / CIS
EmissionsCAL
SymptomsPoor Idle Quality
OccursAlways
Message Closed w/FIX

car Vehicle Data

1986 Mercedes-Benz 420SEL

VIN WDBCA35D4G
Engine4.2 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFuel Injection / CIS
EmissionsCAL
SymptomsPoor Idle Quality
OccursAlways