Diagnostic Aids

WARNING: This page is about a different car, the 2003 GMC Sonoma and 2003 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.

Monitoring misfire current counters or misfire graph, may help to 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.