Evaporative Emissions System: Testing and Inspection

EGR Valve Testing.:

Cannister Purge Valve Chart.:

INCORRECT IDLE:

1. Poor idle, stalling and poor driveablity can be caused by:

^ Damaged canister.

^ Vacuum hoses split, cracked, and/or not connected to the proper tubes.

FUEL LOSS OR ODOR

1. Evidence of fuel loss or fuel vapor odor can be
caused by:

^ Liquid fuel leaking from fuel lines, tank or injector(s).

^ Cracked or damaged canister.

^ Disconnected, improperly routed, kinked, deteriorated of damaged hoses.

^ Air cleaner or air cleaner gasket improperly seated.

NOTE: Fuel odors can be located using an emissions analyzer. Refer to DIAGNOSIS BY SYMPTOM / EXCESSIVE ODORS