Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 31 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.
- Monitoring misfire current counters or misfire graph, may help isolate fuel injector that is causing condition.
- Operating vehicle over a wide temperature range may help isolate fuel injector that is causing condition.
- Perform fuel injector coil test within conditions of customer's concern. A fuel injector condition may only be apparent at a certain temperature, or under certain conditions.
- If fuel injector coil test does not isolate condition, perform fuel injector balance test. See FUEL INJECTOR BALANCE TEST WITH SPECIAL TOOL (3.4L) or FUEL INJECTOR BALANCE TEST WITH TECH 2 (3.4L) .