FUEL SYSTEM AND THROTTLE BODY 5-25 • Calculate the voltage difference between TP sensor output voltage at idle and TP sensor output voltage with the STV full opened. Example:TP sensor output voltage with the STV fully open Minus TP sensor output voltage at idle is 0.027 V STV fully open 1.152 V Idle - 1.125 V 0.027 V TP sensor output voltage variation: 0.021 – 0.032 V • If the voltage variation is out of specification, turn in or out the fast idle adjust screw 3 to adjust the voltage to specification.  The fast idle screw is factory-adjusted at the time of delivery and therefore avoid removing or turning it unless otherwise necessary. • Cool down the engine to ambient air temperature and start the engine to check the fast idle rpm comes with in the specified rpm. E Standard L Fast idle rpm: 1 400 – 2 000 r/min (Cold engine) P Idle rpm : 1 150 ± 100 r/min (Warmed engine) • If it is not at the specified rpm, the cause may possibly be M short-circuit in water temperature sensor or wiring harness or STVA. A S