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Old 08-14-2013, 02:31 PM
emwest emwest is offline
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Default help- 5.2 still has misfire on #8 after plenum fix

1997 Dodge Ram Van 3500, 5.2, only 70k miles, engine strong. On a recent trip the plenum gasket failed, it started burning oil, and fouled number 8. New plug would immediately foul. Drove it home several hundred miles on 7 cylinders, had no choice. Fixed the plenum with the Hughes kit. Engine is happier now but still has a miss on cylinder 8. New plug fouls. Does anyone know how I can "de-foul" this cylinder? Dealer sold us some stuff to spray into the engine, this did not fix it. I really don't want to pull the head. I guess I'll check compression next. Any ideas from anyone? Thanks.
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