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 PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/O CODES - EEC-IVSYMPTOMSHIGH IDLE (DIESELS/RUNS ON)PRELIMINARY CHECKS
1993 Ford Tempo LX, 2.3 X, Standard
Preliminary Checks
1993 Ford Tempo LX, 2.3 X, StandardSECTION Preliminary Checks
Check for vacuum leaks. Check for carbon build-up on throttle plate. Check throttle linkage operation. Check for binding/sticking cruise control chain. Check air intake duct. Check for leaking intake manifold gasket.
- Perform QUICK TEST. See G - EEC-IV TESTS W/CODES article in the ENGINE PERFORMANCE Section. If code is present, perform appropriate CIRCUIT TEST.
- Check idle speed. See IDLE SPEED in ADJUSTMENTS article in the ENGINE PERFORMANCE Section.
- Check air intake system. Also, ensure throttle plate and linkages operate properly.
- On 3.8L SC, if high idle exists with transmission in Drive, go to step 12) of CIRCUIT TEST TA in G - EEC-IV TESTS W/CODES article in the ENGINE PERFORMANCE Section.
- Check A/C system operation.
- Ensure engine operates at normal operating temperature.
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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.