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.
1992 Ford Probe GL, StandardFACTORY OEM SERVICE PROCEDURE
1.8L A/T & 2.2L
- Remove TPS connector. Using jumper wire, attach SIGRTN and VREF terminals between wiring harness connector and TP sensor. See Fig 1. Attach positive lead of voltmeter to sensor TP terminal and negative lead to SIGRTN terminal. Turn ignition on. Slowly depress accelerator pedal.
- Compare voltage to specifications shown in TPS VOLTAGE SPECIFICATIONS (1.8L A/T & 2.2L) . If voltage is not as specified, ensure throttle stop screw and linkage are adjusted correctly. Remove sensor and check for damaged, corroded or misadjusted pins. If okay, install sensor. Ensure sensor is seated correctly. Repeat step 1). If TPS is still not within specification, replace sensor.
TPS VOLTAGE SPECIFICATIONS
| Throttle Position | (1) Volts | ||
|---|---|---|---|
| 1/8 Open | .998 | ||
| 1/4 Open | 1.60 | ||
| 3/8 Open | 2.37 | ||
| 1/2 Open | 2.74 | ||
| 5/8 Open | 3.15 | ||
| 3/4 Open | 3.43 | ||
| 7/8 Open | 3.60 | ||
| Full Open | 4.02 | ||
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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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