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1986 Mercedes-Benz 420SEL 4.2L Poor Idle Quality, Misfire
Hi everyone, Vehicle was presented to me with an extremely hi idle always and misfire on cyl #5 when engine is cold. Measured current to idle valve its about 900 ma at operating temp. I reduced the spring tension inside the idle valve by trial and error and go...
FIX posted 7/5/2006
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Related Documents & Media | VIN | WDBCA35D2G |
| Engine | 4.2 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI |
| Emissions | obd1 |
| Symptoms | Poor Idle Quality, Misfire |
| Occurs | Cold |
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Vehicle Data
1986 Mercedes-Benz 420SEL
| VIN | WDBCA35D2G |
| Engine | 4.2 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI |
| Emissions | obd1 |
| Symptoms | Poor Idle Quality, Misfire |
| Occurs | Cold |
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