I have a 4.3 l and all of a sudden it has a miss when it is warm. It idles excellent but once it warms up it misses like crazy. I changed the plugs, cleaned EGR valve, wires are good but still has a miss when warm. When cold in the morning it runs excellent with lots of power.
Please help with any solutions
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Tuesday, May 5th, 2009 AT 2:38 PM