Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1999EXPRESS 1/2 TON VAN V6-4.3L VIN WREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSCAMSHAFT POSITION SENSORDESCRIPTION AND OPERATION
1999 Chevrolet Express 1/2 Ton Van V6-4.3L VIN W
Camshaft Position Sensor: Description and Operation
1999 Chevrolet Express 1/2 Ton Van V6-4.3L VIN WSECTION Description and Operation
Camshaft Position Sensor:
The Camshaft Position (CMP) sensor is located within the Distributor. It's operation is very similar to the Crankshaft Position (CKP Sensor) however it provides one pulse per camshaft revolution (1x signal). This signal is not detrimental to the driveability of the vehicle. The VCM utilizes this signal in conjunction with the crankshaft position to determine which cylinders are misfiring.
The Camshaft Position (CMP) Sensor is located within the distributor. The operation of the CMP sensor is very similar to the Crankshaft Position (CKP) Sensor.
The CMP sensor will provide one pulse per camshaft revolution (1X signal). The loss of this signal may not affect the driveability of the vehicle, but will affect the type of control the VCM has on the fuel injection system. If this signal is lost the VCM will pulse the injectors bank to bank instead of each individual injector at a time. The VCM also utilizes this signal in conjunction with the crankshaft position in order to determine which cylinder(s) are misfiring.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.