Can't help you much but wanted to let you know my 3 liter was hesitating and bucking a bit at highway speeds. Tried the usual ... new plugs ... wires ... cleaned the MAF and throttle body. Gave up and took it to the Ford dealer yesterday. Turns out it was the cam position sensor. Runs great now. The bill was $340.00.
Good luck,
Greg

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1999 XLT 3 liter ... regular cab ... long bed ... automatic and topper. Custom features include lots of dog hair ... a dog bed ... sticks for the dog ... a water bowl ... various length leashes ... well ... you get the picture.
Just turning 152,000 miles and running great!