Conquest L4-2555cc Throttle Position Sensor - Component Information - Diagrams - Page 1065
Throttle Position Sensor: Adjustments
IDLE SPEED CONTROL (ISC) SERVO & THROTTLE POSITION SENSOR (TPS)
This adjustment is necessary to provide good driveability and is required after the ISC servo, TPS, mixing body or throttle body have been removed or
replaced during routine service.
Fig. 39 Adjusting engine speed