1988 Mercedes-Benz 420SEL 4.2L Poor Idle Quality
car has fast idle,1400rpm,hot-cold,cannot fault idle control system,with no power to system idle increases to 1800rpm,i have ignition timing of 35 deg at idle,specs are 5deg,pull vac line from ezl unit timing drops to 5deg,idle drops under 1000rpm,cannot find ...
FIX posted 4/29/2009
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Vehicle Data1988 Mercedes-Benz 420SEL
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Message Closed w/FIX
Vehicle Data
1988 Mercedes-Benz 420SEL
VIN | WDB1260352 |
Engine | 4.2 L / 8 cyl / GAS |
Trans | 4-speed Automatic |
Delivery | FI / cise |
Emissions | old |
Symptoms | Poor Idle Quality |
Occurs | Always |