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 1) the engine temperature was not warm and stabilized before the test, or 2) the vehicle had idled excessively before the test.

Before to starting any service, complaints of Idle Emission Test failure should be verified.

The following example contains most of the emissions measurement modes of the current state inspection/maintenance test procedures:

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

2. Read emissions at idle.

3. Run engine at 2500 ± 300 rpm.

4. Read emissions within 30 seconds.

5. Return engine speed to idle.

6. Read emissions within 30 seconds.

If any emission components are replaced, perform the following before repeating the State Emission Test procedure:

1. Clear Keep Alive Memory (KAM)—Refer to EEC-IV Quick Test Appendix (Section 5A).

2. To relearn appropriate Adaptive Learning, run engine at 2500 rpm for one minute and idle engine for two minutes.