Diagnostic Aids

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

The system will go lean if an injector is not supplying enough fuel.
A lean condition could be present during high fuel demand due to a restricted fuel filter.
Review the Failure Records using a scan tool. If an intermittent condition is suspected, see INTERMITTENTS in TROUBLE SHOOTING - 2.2L CAVALIER - BI-FUEL - CNG/GASOLINE article.