If friend experience problems with your Ford F-150 or supervisor Duty"s performance, you can be looking in ~ a negative crankshaft position sensor. Haynes Manuals reflects you exactly how to replace the crankshaft position sensor yourself.

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This article uses to the Ford F-150 (2004-2014) and the F-250, F-350 super Duty (2005-2014).

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A crankshaft position sensor sends out information about the place of the crankshaft in her Ford F-150 or super Duty truck to the Powertrain control Module (PCM). Indications of a negative crankshaft position sensor encompass problems beginning the engine as soon as it’s cold outside, acceleration issues, loss of power, and poor fuel mileage.

On the 4.2L V6 engine, the sensor is located over the crankshaft wheel on the time chain cover. ~ above 4.6L and also 5.4L V8 engines, it"s situated on the right lower side of the timing chain cover, behind the air conditioning compressor.


Materials NeededCrankshaft place sensor1/2 customs drive ratchet or breaker bar (V8 models only)Rachet, extension and also socket to fit crankshaft position sensor bolt(s)Socket to fit A/C compressor bolts (V8 models only)

Step 1 - remove the drivebelt (V8 models only)

Push the square journey of a ratchet or breaker bar into the feet at the end of the drivebelt tensioner arm. Rotate the tensioner clockwise to release stress and anxiety on the belt, climate slip the belt off of the air conditioning compressor pulley.


Figure 1. Rotating the drivebelt tensioner (V8 models)

Step 2 - relocate compressor out of the means (V8 models only)

Remove the air conditioning compressor mounting bolts and also reposition the compressor to the side, sustaining it v a length of wire.

WARNING: The air conditioning device is under high pressure. Perform NOT detach the refrigerant lines.

Figure 2. A/C compressor mounting bolts

Step 3 - remove the crankshaft position sensor

Disconnect the electric connector native the crankshaft place sensor, then remove the bolt(s) and pull the sensor from the engine.


Figure 3A. Crankshaft place sensor details for V6 engine.

1) electrical Connector. 2) Sensor mounting bolts. 3) Crankshaft position sensor


Figure 3B. Crankshaft place sensor mounting bolt for V8 engine.

Step 4 - download the new sensor

Clean the sensor mounting surface, climate install the new sensor come the engine. Tighten the mounting fastener(s) come 89 inch-lbs, climate reconnect the electrical connector.

Step 5 - Reinstall the a/c compressor (V8 models only)

Place the compressor right into position and also install the mounting bolts, tightening them to 18 ft-lbs.

Step 6 - Reinstall the drivebelt (V8 models only)

Rotate the tensioner clockwise again and also slip the belt ~ above the air conditioning compressor wheel (and make sure it is properly involved with every one of the other pulleys, too). Progressively release the tensioner and remove the ratchet or breaker bar.

Figure 4A. Drivebelt routing diagram (V8 models).

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Figure 4B. When installing the belt, make sure it is centered on every one of the pulleys.

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