Fuel System Checks

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.

Check the following items:

Check for proper EVAP Purge system operation (Bi-Fuel, CNG only)
Check the fuel injectors for leakage.
Check for correct throttle blade adjustment, if applicable.
Perform the fuel system diagnostic procedure. See FUEL SYSTEM DIAGNOSIS (CNG) under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - 2.2L ALERO, CAVALIER, GRAND AM & SUNFIRE article.