If you experience difficulties with her Ford F-150 or super Duty"s performance, you might be looking at a bad crankshaft place sensor. Haynes Manuals mirrors you how to change 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 at sight Duty (2005-2014).

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

On the 4.2L V6 engine, the sensor is located above the crankshaft pulley-block on the timing chain cover. On 4.6L and 5.4L V8 engines, it"s situated on the right reduced side the the time chain cover, behind the air conditioning compressor.


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

Step 1 - eliminate the drivebelt (V8 models only)

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


Figure 1. Rotating the drivebelt tensioner (V8 models)

Step 2 - move compressor the end of the method (V8 models only)

Remove the air conditioning compressor mounting bolts and reposition the compressor to the side, supporting it through a length of wire.

WARNING: The air conditioning system is under high pressure. Do NOT detach the refrigerant lines.

Figure 2. A/C compressor mounting bolts

Step 3 - eliminate the crankshaft position sensor

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


Figure 3A. Crankshaft place sensor details because that V6 engine.

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


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

Step 4 - download the brand-new sensor

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

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

Place the compressor into position and 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 top top the air conditioning compressor wheel (and make sure it is properly involved with every one of the various other pulleys, too). Slowly release the tensioner and remove the ratchet or breaker bar.

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

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

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