2004 Ford Expedition Repair Question
Asked on July 13, 2011
Hesitation worse when going up hill more of a mis then a hesitation
No engine lite and now there is a nocking sound coming from the rear when I go up hill??
Asked by painteredAnswer
Replied on August 11, 2011
Could be one of the following below -check and test:
Oxygen sensors.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.
Note:If it doesn't apply disregard.
