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International Automotive Technicians Network
1987 Mercedes-Benz 420SEL 4.2L Poor Idle Quality
Posted to European Driveability on 5/19/2008 8 Replies

Engine idles high at about 1100 [...] checked for vac leaks & [...] tested coolant sensor,throttle switch,cleaned throttle body,checked [...] & checked idle control valve.I can operate idle control valve with power probe & seems to work [...] checked signal to...

8 Replies Received (View Replies)

  Related Documents & Media  1987 Mercedes-Benz 420SEL

 
Message Closed w/FIX

car Vehicle Data

1987 Mercedes-Benz 420SEL

VIN WDBCA350XH
Engine4.2 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI / BOSCH E CONT INJECTION
EmissionsCA EMISSIONS
SymptomsPoor Idle Quality
OccursIdle
Message Closed w/FIX

car Vehicle Data

1987 Mercedes-Benz 420SEL

VIN WDBCA350XH
Engine4.2 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI / BOSCH E CONT INJECTION
EmissionsCA EMISSIONS
SymptomsPoor Idle Quality
OccursIdle