GM Service Manual Online
For 1990-2009 cars only

Results Of Incorrect Operation

    • A damaged canister and hoses split, cracked or not connected to the proper tubes can cause the following items:
       - Poor idle
       - Stalling
       - Poor driveability
    • Evidence of fuel loss or fuel vapor odor can be caused by the following items:
       - Liquid fuel leaking from fuel lines or TBI unit.
       - Cracked or damaged canister.
       - Disconnected, misrouted, kinked, deteriorated or damaged vapor pipe, or canister hoses.
       - Air cleaner or air cleaner gasket improperly seated.

Visual Check Of The EVAP System

    • inspect the pipes and hoses occasionally for leaks, kinks, or dents. Repair the problem as required.
    • Replace canister if cracked or damaged.
    • Replace canister if fuel is leaking from bottom and check operation of the total system.