Emissions Compliance

Canada and some states or metropolitan areas in the United States require periodic idle emission tests. All Ford products have been designed to pass these tests. If a Ford product fails an idle emission test, it is probable that the engine temperature was not warm and stabilized prior to the test, or the vehicle had idled excessively long prior to the test.

Before starting any services, verify complaints of idle emission test failure by using test procedure of area that failed vehicle. The following encompasses most of the emissions measurement modes of current state idle test procedures:

• Ensure engine is at normal operating temperature and all accessories are turned off.
• Check emissions at idle.
• Operate engine at 2200-2800 RPM.
• Check emissions within 30 seconds.
• Return engine speed to idle.
• Check emissions within 30 seconds.

If any emission component is changed, Keep-Alive Memory (KAM) should be cleared before repeating state emission test procedure. See G - EEC TESTS W/CODES article in the ENGINE PERFORMANCE Section.

• Perform QUICK TEST. See G - EEC TESTS W/CODES article in the ENGINE PERFORMANCE Section.
• Check ignition system. See F - EEC BASIC TESTING article in the ENGINE PERFORMANCE Section.
• Check for vacuum leaks.
• Check fuel delivery system. See I - EEC SYS/COMP TESTS article in the ENGINE PERFORMANCE Section.
• Check EGR system. See I - EEC SYS/COMP TESTS and G - EEC TESTS W/CODES articles in the ENGINE PERFORMANCE Section.
• Check PCV system.
• Check Evaporative Emission (EVAP) system. See I - EEC SYS/COMP TESTS and G - EEC TESTS W/CODES articles in the ENGINE PERFORMANCE Section.
• Check air intake system. Also, ensure throttle plate and linkages operate properly.
• Check for restricted exhaust system.
• Check cooling system.
• Check engine compression. Check engine mechanical condition. Check intake manifold, manifold gasket, camshaft and valves.