Forum Discussion
Rich___Cheri_
Mar 04, 2009Explorer
Was having misfires and rough running at high speeds and when accelerating at higher speeds. Checked spark plugs and they were very bad. Gaps were about .065 and tips were eroded. There was evidence of spark jumping to plug collar. Installed new plugs and engine now runs great. Plugs were supposed to be good for 100,000 miles but I only had 37,000 miles.
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