1986 Mercedes-Benz 420SEL 4.2L Excessive Emissions, Poor Idle Quality, preignition on accel
Timing at idle read with a standard timing light is 38 deg. Timing does not change with or without vacuum.
FIX posted 5/21/2009
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Message Closed w/FIX
Vehicle Data1986 Mercedes-Benz 420SEL
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Message Closed w/FIX
Vehicle Data
1986 Mercedes-Benz 420SEL
VIN | WDBCA35D2G |
Engine | 4.2 L / 8 cyl / GAS |
Trans | 4-speed Automatic |
Delivery | FI / CIS |
Emissions | FED |
Symptoms | Excessive Emissions, Poor Idle Quality, Preignition on Accel |
Occurs | Always |