System Tests (Evaporative Emission): Notes

WARNING: This page is about a different variant/trim than selected.

NOTE: On Cougar, evaporative emission diagnostic procedures are not available from manufacturer.

NOTE: Prior to performing any system test, see HOW TO USE SYSTEM TESTS under SYSTEM TESTS. If instructed to replace Powertrain Control Module (PCM) after performing a system test, new PCM must be programmed. See PROGRAMMING PCM .

Perform these tests when instructed during QUICK TEST or if directed here from another article or from DIAGNOSTIC TROUBLE CODE DEFINITIONS . Perform appropriate evaporative emission system test. See EVAPORATIVE EMISSIONS DIAGNOSTIC TROUBLE CODE DEFINITIONS . For emission-related symptom tests, see EXCESSIVE FUEL ODOR, HISSING SOUND WHEN REMOVING FUEL CAP or UNABLE TO REFUEL VEHICLE under EVAPORATIVE EMISSION SYSTEM TESTS in appropriate SYSTEM & COMPONENT TESTING article.

NOTE: To identify EVAP system components, see appropriate illustration. See Fig 1-Fig 8 .

Fig 1: Identifying EVAP System Components (Blackwood, Econoline, Expedition, Explorer Sport, Explorer Sport Trac, F150 Pickup, Navigator, Ranger & Windstar)