Wednesday, 15 April 2015

Ford F-150/F-250: How to Replace Crankshaft Position Sensor

Ford F-150/F-250 Crankshaft Position Sensor Replacement.


If you experience problems with your Ford F-150 or Super Duty's performance, you might be looking at a bad crankshaft position sensor. Learn how to replace the crankshaft position sensor yourself.


Ford F-150 (2004-2014) and the F-250, F-350 Super Duty (2005-2014).

A crankshaft position sensor sends information about the position of the sensor in your Ford F-150 or Super Duty truck to the computer system of the engine. Signs of a bad crankshaft position sensor include problems starting the engine when it’s cold outside, acceleration issues, loss of power, and poor fuel mileage. It is found under the AC compressor and can be loosened by sliding it out of the motor, which is found on the bottom left area.

Materials Needed

  • Crankshaft position sensor
  • 1/2 inch socket wrench
  • Open end wrench
  • Compressor pulley

Step 1 - Turn the pulley

Push the tip of the socket wrench in the hole in the center of the serpentine belt pulley, which is a small pulley around the belt. Move the pulley to the left using the socket wrench and pull the belt from the air conditioning compressor pulley.
    • Figure 1. Serpentine belt pulley.
    • Figure 2. Pulley diagram.

Step 2 - Move the compressor

Remove the bolt from the air conditioning compressor towards the mounting bracket using an open end wrench, and move the compressor to the side of the engine compartment. The compressor will easily be disconnected; disconnect the hose attached to it using a wrench and free it from the belt.

Figure 3. Move the compressor.

Step 3 - Disconnect electrical connection

Disconnect the electrical connection from the crankshaft position sensor.

Figure 4. Disconnect the electrical connection.

Step 4 - Remove the crankshaft position sensor

Remove the two bolts on the crankshaft sensor of the engine using an open-end wrench and slowly remove the sensor from the engine. The bolts are holding the bracket that holds the sensor on top and on the bottom.

Figure 5. Remove crankshaft position sensor.

Step 5 - Install new sensor

Put the sensor into the engine, install and fasten the two bolts on the sensor using an open-end wrench.

Figure 6. Fasten the bolts.

Step 6 - Connect electrical connection

Connect the electrical connectors together.

Figure 7. Connect the crankshaft position sensor.

Step 7 - Re-install air conditioning compressor

Tighten the bolts for the compressor and connect the hose you removed. Then, place the belt back on it and tighten the pulley.

Figure 8. Fasten and install the AC compressor.

Step 8 - Adjust the pulley

Push the serpentine belt adjustment pulley in the direction of the engine with a socket wrench and place the belt on the air compressor pulley.

Figure 9. Adjust the pulley.

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