Diagnostic Aids

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Savana, 2003 Chevrolet Silverado, and 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

Operating vehicle over a wide temperature range may help isolate the fuel injector that is causing the condition.
Perform fuel injector coil test within the conditions of the 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 the condition, perform fuel injector balance test. Refer to FUEL INJECTOR BALANCE TEST WITH SPECIAL TOOL .