2008 Polaris Sportsman 500 EFI/X2/Touring/500 H.O. Service Manual, Page 135Get this manual
FUEL INJECTION Engine Temperature Sensor Test
Polaris dealers can test the sensor by using the Polaris Digital Software (dealer only)Refer to the Digital Wrench Wrench Software Manual for more informationTo measure the sensor using an ohmmeter, place the tester leads on each terminal an read the resistance with the sensor at an ambient temperature of 68 (20 C)
FUEL SYSTEM TROUBLESHOOTING
FUEL STARVATIONLEAN MIXTURE
The correct position of the throttle body idle stop is established and set at the factoryDo not loosen the throttle body idle stop or alter the stop position in any fashionIf the stop is repositioned, the entire throttle body assembly must be replacedSymptoms: Hard start or no start, bog, backfire, popping through intakeexhaust, hesitation, detonation, low power, spark plug erosion, engine runs hot, surging, high idle, idle speed erratic No fuel in tank Restricted tank vent, or routed improperly Fuel lines or fuel injectors restricted Fuel filter plugged Fuel pump inoperative Air leak in system Intake air leak (throttle shaft, intake boot, gasket or grommet) Throttle stop screw tamperingreplace throttle body Failed Sensor or disconnected wiring