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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
My 2003 Sport Trac with 165k miles has recently started to pulse at idle on a cold start, with the pulses smoothing out with 30 seconds or so. Although the revs hold constant at ~1000rpm, it feels as if someone is pumping the gas. The problem is most pronounced if idling in gear (forward or...