2006 Honda TRX680 Rincon Factory Service Manual, Page 563Get this manual
TROUBLESHOOTING
POOR PERFORMANCE AT LOW AND IDLE SPEED
1Spark Test Perform spark testIs there weak or intermittent spark? YES Faulty spark plug Fouled spark plug Loose or disconnected ignition system wires Broken or shorted spark plug wire Faulty ignition coil Faulty CKP sensor Faulty engine stop switch Faulty ignition switch Faulty PCM NOGO TO STEP 22Fuel Pump Inspection Inspect the fuel flowIs the fuel pump unit normal? NO YESFaulty fuel pump unit (page 6-36)GO TO STEP 3