Install a Camshaft Sensor

The electronic control module or ECM, monitors the camshaft sensor to determine the correct time to inject fuel into the cylinder. It also uses the sensor to determine the correct time to ignite the fuel air mixture. The camshaft sensor is a magnetic or Hall effect sensor that provides a pulse or voltage to the ECM input. The ECM monitors the signal to determine proper engine timing. The camshaft sensor is mounted in the cylinder head of the engine. An inline engine--all the cylinders are in a row--will have one camshaft sensor. A V-block engine--cylinders are on both sides of the engine block--will have two camshaft sensors, one on each cylinder head. If you experience hard starting issues such as the engine cranks but does not start or engine misfires and hesitation, there may be a problem with your engine's camshaft sensor.

Procedures:
1. Open the hood and set the prop rod to hold the hood open. Disconnect the negative battery terminal from the battery.
2. Disconnect the old camshaft sensor from the engine harness connector. Remove the old sensor from the cylinder head. Retain the mounting bolts for installing the new sensor. Inspect the sensor mounting location and remove any O-ring material that is stuck to the mounting surface. Remove oil and dirt from the sensor mounting location.
3. Remove the new sensor and compare it with the old sensor. Confirm that the sensors are the same and the electrical connector and mounting locations are correct. Locate the new O-ring and verify that it fits properly in the O-ring grove.
4. Slide the sensor into the cylinder hole. Install the camshaft sensor mounting bolts. Be sure to tighten the bolts securely. Connect the sensor to the engine harness connector.