Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Emissions Compliance: Notes
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 the TESTS W/CODES - EEC-IV article.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.