Emissions Compliance: Notes

WARNING: This page is about a different car, the 1995 Ford Aerostar. However, it is still accessible from the selected car via links, so may be relevant.

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 idle emission test, it is probable that engine temperature was not warm and stabilized prior to the test, or vehicle had idled excessively for long period 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. To clear KAM, disconnect negative battery cable for at least 5 minutes. Preliminary Checks

Check for vacuum leaks/blockage. Check wiring harness connectors for clean, tight fit. Ensure vehicle scheduled maintenance is current.