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.
TPS Check/Adjust
Connect a scan tool to ALDL connector. With ignition ON, engine stopped, and throttle in specified position, verify TPS is within specifications. See TPS BASE VOLTAGE SPECIFICATIONS table. Adjust if necessary by loosening TPS screws and twisting TPS until correct voltage is reached. See Figure for TPS exploded view. Retighten screws and verify the TPS voltage didn't change.
| Application | Voltage | Throttle Position | ||
|---|---|---|---|---|
| Normal Range | .35 - .67 | Curb Idle | ||
| Setting Range | .55 +/-.1 | Curb Idle | ||
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NO RELATED
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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.