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.
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HOMESERVICE MANUALSFORD1993TEMPO LX, 2.3 X, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMEGR FUNCTION TESTINGEGR VALVE TESTINGPORTED EGR VALVE
1993 Ford Tempo LX, 2.3 X, Standard
Ported EGR Valve
1993 Ford Tempo LX, 2.3 X, StandardSECTION Ported EGR Valve
- Check vacuum hoses for correct routing. Connect a vacuum gauge directly to EGR vacuum source. With engine running, open and close throttle quickly to at least 1/2 open position. If gauge reading indicates vacuum, EGR vacuum supply is okay and vacuum port is open.
- If gauge reading indicates no vacuum, EGR vacuum port is plugged or restricted and should be cleaned. Disconnect vacuum hose at EGR valve, and plug hose. Connect a hand-held vacuum pump to EGR valve.
- Start engine. Apply 6-10 in. Hg to EGR valve. Engine speed should drop at least 100 RPM or stall. Vacuum should not drop more than 1 in. Hg in 30 seconds. Reconnect EGR vacuum hose.
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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.