Explorer Sport Trac 2WD V6-4.0L (2009)
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Spark plugs - check for cracks, high resistance or broken insulators
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Spark plug wires
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Fuel injector - filter may be plugged
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Fuel contamination - engine driveability concerns
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EGR valve - valve may let in too much exhaust gas and cause engine to run lean
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Vacuum leak - engine will not get correct air/fuel mixture
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Manifold Absolute Pressure (MAP) and Mass Air Flow (MAF) sensor - incorrect air/fuel mixture
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Heated Oxygen Sensor (HO2S) - too rich/lean air/fuel mixture
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Fuel pressure - may be too low
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Engine mounts - loose/damaged mounts can cause vibration concerns
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Axle joints - check for vibration
Torque Converter Contamination Inspection
Torque Converter Contamination Inspection
1. A new or remanufactured torque converter must be installed if one or more of the following statements is true:
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A torque converter malfunction has been determined based on complete diagnostic procedures.
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The torque converter stud or studs, impeller hub or bushing are damaged.
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The torque converter exhibits external discoloration (due to overheating).
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There is evidence of transmission assembly or fluid contamination due to the following transmission or converter failure modes.
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Major metallic failure
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Multiple clutch plates or band failures
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Sufficient component wear which results in metallic contamination
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Water or antifreeze contamination
2. If none of the above conditions are present, continue with the following fluid inspection.
3. Pour a small amount of transmission fluid from the torque converter onto an absorbent white tissue or through a paper filter.
4. Examine the fluid for contaminants, color and smell. The fluid must be free of contaminants, red in color and not have a burnt smell.
5. NOTICE: Do not use water-based cleaners or mineral spirits to clean or flush the torque converter or transmission damage will occur.
If the fluid passed inspection:
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drain the remaining fluid from the torque converter.
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using only the recommended transmission fluid, add 1.9L (2 qt) of clean fluid into the converter and agitate by hand.
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thoroughly drain the fluid.