Throttle Position Sensor: Adjustments

1982 Chevrolet Chevette L4-98 1.6LSECTION Adjustments

Fig. 4 Typical Holley 6510-C carburetor exploded view:




Fig. 12 Throttle Position Sensor (TPS) adjustment:






1. Remove TPS adjustment screw (52), Fig. 4, and apply thread sealing compound to screw.
2. Connect digital voltmeter between terminals B and C of TPS, leaving harness connector in place, Fig. 12. Insert voltmeter probes into rear of connector, ensuring that probes make proper contact with connector terminals.
3. Set fast idle screw on high step of cam.
4. Turn ignition to on position but do not start engine. Install TPS adjusting screw and adjust quickly to obtain voltmeter reading of 0.92 volts.



RENDER: 1.0x

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.