Mechanics

HESITATION WORSE WHEN GOING UP HILL MORE OF A MIS THEN A HESITATION

2004 Ford Expedition • V8 4WD Automatic • 106,000 miles

No engine lite and now there is a nocking sound coming from the rear when I go up hill?
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Paintered
July 13, 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.

Rasmataz
Aug 11, 2011.


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