1989 Dodge Ram Happens Van Running Sluggish You Check Spark Plugs Them Producing

1989 DODGE RAM
206,148 MILES
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What happens if the van is running sluggish and you check the spark plugs and all of them are producing a spark but only 4 of them make the van idle down to the point where it will cut off? is that the cylinders and if so how much of a repair job is that?
Jan 29, 2013 at 8:06 AM
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JDL
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What is litre size of engine? You did a cylinder balance test and only 4 cylinders had any effect on idle? The ones that had no effect are considered dead cylinders. Check Spark--fuel--compression. Are there any applicable mil codes?
Jan 29, 2013 at 9:02 AM
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