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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
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6 Replies Received
6 Replies Received
Related Documents & Media | 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 |
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 |
Video