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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.
Good afternoon, Sorry about so many edits but I keep getting new info. See the end.
My first post here but I've checked the forum out for many useful items over the years.
2005-4.0 SOHC with 150K but it's been well cared for as I've had it for 10+ years. It usually runs great with 22 mpg but...
I can't find a vacuum leak anywhere.
It all started suddenly. The engine started running very rough. It would almost stall at traffic lights and I had to drive two-footed to keep it running to nurse it home. It is running extremely rich to the point where it blows black soot out of the...