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 engine shutoff solenoid operation. Check electrical connections.
- Check air filter, turbocharger and air intake system for a restriction.
- Check glow plug operation. Check and/or replace glow plugs or controls.
- Check for plugged fuel return system for restrictions.
- Check fuel cap vent.
- Check for slow engine cranking.
- Check engine for low compression. Check for incorrect valve timing, bent push rods, broken valve springs or worn camshaft lobes.
- 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.
- Inspect the fuel pressure regulator 12-volt circuit for an intermittent short to ground. Observe the FRP command percent while cranking. A range of 85-95 percent indicates a possible short to ground condition.
- Check for incorrect or contaminated fuel.
- Check for incorrect pump timing. See appropriate SELF-DIAGNOSTICS article.
- Check Engine Coolant Temperature (ECT) sensor, Reading should be within 5°F of ambient air temperature on a cold engine.
- Inspect the Fuel Rail Pressure (FRP) sensor. Use scan tool to observe FRP with engine off. FRP should be 1.1-1.4 MPa. If not, inspect for high resistance in the low reference, 5-volt reference circuits, or the FRP sensor.
- Inspect the Crankshaft Position (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.