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I've got a 91 explorer. I've noticed that when I start it in the morning there is a rapid rhythmic tapping sound in time with the engine. It goes away when the engine is warmed up. I don't know if something is shot in the engine or if it's a sympathetic vibration. Any ideas?
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.