2009 Polaris Sportsman 850 XP EFI EPS Service Manual, Page 72Get this manual

2009 Polaris Sportsman 850 XP EFI EPS Service Manual, Page 72

ELECTRONIC FUEL INJECTION FUEL SYSTEM TROUBLESHOOTING The correct position of the throttle body stop screw is established
fuel injectors restricted Fuel pump inoperative Air leak in system Intake air leak (throttle shaft, intake boot, gasket or
grommet) Throttle stop screw tampering Failed sensor or disconnected wiring Symptom: Idle Too Low (if less than 1100 RPM
when engine is warm) Plugged air filter Leaking injector (rich condition) Belt dragging Throttle stop screw tampering Failed
sensor or disconnected wiring Symptom: Erratic Idle Throttle cable incorrectly adjusted Air Leaks, dirty injector TPS damaged
or misadjusted Tight valves Belt dragging Dirty air cleaner Engine worn Spark Plug fouled Throttle stop screw tampering Failed
sensor or disconnected wiring Rich Mixture Symptoms: Fouls spark plugs, black, sooty exhaust smoke, rough idle, poor fuel
economy, engine runs rough misses, poor performance, bog, engine loads up, backfire Air intake restricted (inspect intake