Does anyone know why my Expedition hesitates upon normal acceleration? If I floor it, it takes off fine. New spark plugs. They are Autolite High Thread. They say not to gap them. New Camshaft Position Sensor and fuel filter. I also cleaned the Mass Air Flow Sensor. I just put in a bottle of 3M injector cleaner.

 

is the check engine light on? if it is, most larger auto parts stores can read the codes from your check engine light for free.

 

have the coil packs checked one is probably bad