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.
1989 Ford Taurus SHOFACTORY OEM SERVICE PROCEDURE
EGR Load Control (WOT) Valve
- This valve dumps EGR vacuum to the atmosphere at or near full throttle. With engine running at normal temperature, set throttle on kickdown step (high cam). Connect vacuum gauge to EGR side of WOT valve.
- Apply a minimum of 6 in. Hg vacuum to WOT valve port "C". See Fig 1 . Gauge should drop to zero. If not, replace valve. Adjust WOT valve so vacuum applied by hand pump will drop when near WOT.
Factory Service Tools
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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.
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