My Ford Explorer idles rough when the engine is warm. The spark plugs, wires, and fuel filter have been replaced. A compression test yielded 150 per cylinder. The rough idling is somewhat intermitent. The engine seems to run smoother with higher rpm. Any ideas?
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The only thing that was done to this 1993 ford explorer was change the spark plugs, wires and fuel filter, PCV and a grommet.
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