Possible Causes & Corrections
WARNING: This page does not describe the selected car, but rather 34 other vehicles, including the 2002 Saturn Vue, 2002 Pontiac Montana, 2002 Pontiac Aztek, 2002 Oldsmobile Silhouette, and 2002 Oldsmobile Bravada. However, it is still accessible from the selected car via links, so may be relevant.
Check the following items:
- Check injector nozzles. See appropriate SYSTEM & COMPONENT TESTING article.
- Inspect fuel delivery system. Check for no fuel to injection pump or air in fuel system. See BASIC FUEL SYSTEM CHECKS (DIESEL) in appropriate BASIC DIAGNOSTIC PROCEDURES article.
- Check for water contaminated fuel.
- Inspect for high fuel supply system vacuum after a cold start or during moderate or full throttle acceleration. If the vacuum jumps above specification, there is a restriction in the fuel system.
- Observe the Fuel Rail Pressure (FRP) sensor and the fuel pressure regulator commanded percent at idle. FRP should be near 40 MPa, and commanded percent should be near 40 percent. If the command is high, a fuel pressure or sensor exists.
- Inspect for an intermittent Crankshaft Position (CKP) sensor signal.
- Inspect the CKP sensor reluctor wheel. Remove CKP sensor and attempt to move reluctor wheel front to back or side to side with a probe. If there is any movement the reluctor wheel retaining bolts are loose.
- Check charging system output. Repair charging system if voltage is less than 9 volts or more than 16 volts.