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:

Ensure owner understands operation of TCC and A/C clutch operation, as stated in owners manual.
Check injector nozzles. See appropriate SYSTEM & COMPONENT TESTING article.
Ensure Vehicle Speed Sensor (VSS) reading matches vehicle speedometer reading.
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 the Crankshaft Position (CKP) sensor reluctor wheel. Remove the CKP sensor and attempt to move the reluctor wheel front to back or side to side with a probe. If there is any movement the reluctor wheel retaining bolts are loose.
Inspect for a sticking fuel pressure regulator. The symptom for this condition will be an idle surge of at least 100 RPM. This surge will be from 50 RPM above desired idle speed to 50 RPM below desired idle speed.
Check charging system output. Repair charging system if voltage is less than 9 volts or more than 16 volts.
Check transmission for proper shifting and Torque Converter Clutch (TCC) system for proper operation.
Check control module grounds for correct locations, tight and clean connections. See WIRING DIAGRAMS article.
Visually check vacuum hoses for splits, kinks and proper connections as shown on vehicle emission control information label.