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Performance Upgrades - Maintenance - Modifications - Problem Solving - Off-Road - Street Trucks. Covering the Explorer, ST, Sport, Lincoln Aviator, Sport Trac, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Aerostar. Featuring H.I. - Human Intelligence.
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I have a 97 Explorer 4.0 OHV and was recently getting misfire code P304 which is a misfire on cyl #4. Changed the plug which was worn but nothing out of the ordinary. Still getting code....worked backward checking wires, replacing coil pack. Thought to be an intermittent...