Mine has the factory 20 inch wheels and tires. Started at the same time the rotors warped. Had them turned. Stopped the brake pedal pulsing, but the wobble stayed. I would look at the Ford with the 5.0. Engine. The 5.4.i had was gutless. Had to floor it to make it go.also the spark plugs break in half, sometimes the tip falls in the combustion chamber. Requires a special tool to remove.