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Ford Explorer Community - Maintenance - Modifications - Performance Upgrades - Problem Solving - Off-Road - Street
Explorer Forum Covers the Explorer ST, Explorer Sport, Explorer Sport Trac, Lincoln Aviator, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Ford Aerostar
Our '92 Explorer 4x4 4.0L just started doing this and there has been no work done on it recently. Cold start is good (and by cold I mean -30 to -40 C) but after 5-10 minutes of warming up, the idle starts to rhymthically fluctuate from about 600 to 900 RPM. When it's put into gear, it will...