Throttle Position Sensor Adjustment

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. On models with full function C-3 system, ensure throttle is in curb idle position. On models with minimum function C-3 system, 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 0.42 volts on models with full function system or 0.92 volts on models with minimum function system.