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Why is your 2003 dodge ram 1500 van 3.9L engine giving you a misfire in the 3 cylinder even after a tuneup?
Wiki User
∙ 14y ago
Were the spark plug wires replaced? Even a pinhole in a plug wire can leak enough spark to cause a misfire. Try swapping that wire with another similar length wire from another plug and see where the misfire is then. If the misfire moves to the new cylinder or ceases completely, you'll know the wire was bad.
Wiki User
∙ 14y ago
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Must fuel injectors be replaced when a cylinder is misfiring even after a complete tuneup including spark plug wires has been performed?
Check the timing on your vehicle ,but there's more on why your getting a misfire
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