my f-150 5.0 4x4 mod was acting funny when i bought it. when i started from a stop i had sluggish power, poor gas milage and hesitation when i romped on the gas pedal. i replaced spark plugs,wires, fuel filter, vacuum leaks (found none), aair filter, checked copm codes all good, cchecked egr good, replaced the tps. you wont believe where i found the problem. it was the map sensor. i replaced it and erased the computor and she has ben running like a gem since. i had the same dilema when i checked my timing. it took me a day to find the spout connector for the timing. all it is is a suitcase jumper. its on the driverside on our truck. good luck