If you experience troubles with your Ford F-150 or supervisor Duty"s performance, you could be looking in ~ a negative crankshaft place sensor. Haynes Manuals shows 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 information around the position of the crankshaft in her Ford F-150 or at sight Duty truck to the Powertrain manage Module (PCM). Indicators of a negative crankshaft place sensor include problems starting 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 over the crankshaft pulley-block on the time chain cover. On 4.6L and 5.4L V8 engines, it"s situated on the right reduced side that the time chain cover, behind the air air conditioning compressor.


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

Step 1 - remove the drivebelt (V8 models only)

Push the square drive of a ratchet or breaker bar right into the hole at the finish of the drivebelt tensioner arm. Revolve the tensioner clockwise to release anxiety on the belt, climate slip the belt turn off of the air air conditioning compressor pulley.


Figure 1. Rotating the drivebelt tensioner (V8 models)

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

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

WARNING: The wait conditioning system is under high pressure. Perform NOT detach the refrigerant lines.

Figure 2. A/C compressor mounting bolts

Step 3 - remove the crankshaft place sensor

Disconnect the electrical connector indigenous 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 place sensor


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

Step 4 - download the new sensor

Clean the sensor mounting surface, then install the brand-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 onto the air conditioning compressor pulley (and make sure it is properly engaged with every one of the other pulleys, too). Slowly release the tensioner and also remove the ratchet or breaker bar.

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

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

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