Diagnostic Note

NOTE: 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.

Prior to starting any services, complaints of an idle emission test failure should be verified by using the test procedure of the area which failed the vehicle if the area is approved by Ford for performance warranty.

The following example encompasses most of the emissions measurement modes of the current state idle test procedures:

^ Ensure that the engine is at normal operating temperature and that all accessories are turned off.

^ Read the emissions at idle.

^ Run the engine at 2500 +/- 300 rpm.

^ Read the emissions within 30 seconds.

^ Return the engine speed to idle.

^ Read the emissions within 30 seconds.

If any emission components are changed, Keep Alive Memory (KAM) should be cleared before repeating the state emission test procedure.