2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 162Get this manual

2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 162

500 EFI FUEL SYSTEM Fuel Injector Service Injector problems typically fall into three general categories- electrical, dirtyclogged,
be caused by dirtyclogged injectors include rough idle, hesitationstumble during acceleration, or triggering of fault codes
related to fuel deliveryInjector clogging is usually caused by buildup of deposits on the director plate, restricting the
flow of fuel, resulting in poor spray patternSome contributing factors to injector clogging include; dirty air filters, higher
than normal operating temperatures, short operating intervals and dirty, incorrect, or poor quality fuelCleaning of clogged
injectors is not recommended; they should be replacedAdditives and higher grades of fuel can be used as preventative measure
if clogging has been problem Fuel Injector Resistance Test If an injector is not operating, it can indicate either bad injector,
or wiringelectrical connection problemCheck as follows: Using an ohmmeter, test for continuity by placing the test leads