Weak aluminum heads that pop the plugs out stripped head threads as the result. This puts a large amount of money to be put on the owner they don’t know about when purchasing it.

Bought-2001 F-150 King Ranch Crew Cab, 5.4, 4x4, 4 seat Sport interior, with every option available that year. Today, has 317,632 miles and never worked on exept for normal maintenance items, and runs perfect, getting around 14 mpg. Pull my boat, 9 tons from Fla, to NC including it's 310 gallons of fuel at 52 mph the whole trip. Do I love this truck? You better believe it, not another truck anywhere could preform like this, and it had, 270,000 miles on it when I bought it!!!!

The truck is a rust magnet and every truck made at same time that i see has exact same spots rusted my running boards are completely gone and i live ford trucks and vehicles only brand I’ve owned my 1990 ranger had zero rust on it and was older so if buy 99 to 03 f150 check for rusty frame