Arctic Cat M 8000, Service Manual

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104
Troubleshooting Engine
Problem: Engine Does Not Start (No Spark at Spark Plugs)
Condition Remedy
1. Key in the OFF position
2. Emergency stop switch in DOWN position —
malfunctioning
3. Ground connections dirty — loose
4. RPS switch malfunctioning
5. Wiring harness shorting — disconnected
6. Spark plugs fouled — damaged
7. Spark-plug caps damaged — leaking — shorting
8. High tension leads/coil loose — grounded — faulty
9. Ignition timing sensor faulty
10. Stator faulty
11. ECM/CCU faulty
1. Turn key to the ON position
2. Move switch to UP position — replace throttle control
3. Check all ground connections — clean and tight
4. Fully seat cable in control housing — Adjust throttle cable
tension — replace faulty switch
5. Repair — replace — connect wiring harness
6. Clean — replace spark plugs
7. Replace spark-plug caps
8. Service — replace high tension leads/coil
9. Replace sensor
10. Replace stator
11. Replace ECM/CCU
Problem: Engine Does Not Start (No Fuel at Cylinders)
Condition Remedy
1. Fuel tank empty
2. Fuel hose broken — pinched
3. Fuel tank vent hose — obstructed
4. Pick-up valve(s) obstructed — damaged
5. Fuel pressure regulator faulty
6. Fuel filter plugged
7. Fuel pump faulty
8. Wiring harness shorting — disconnected
9. Injector (s) stuck closed
10. Primary compression low
11. Stator faulty (Fuel pump or injector coil)
12. ECM faulty
1. Fill tank
2. Replace hose
3. Remove obstruction — replace vent — hose
4. Remove obstruction — replace pick-up valve(s)
5. Replace regulator — hose
6. Replace fuel filter
7. Service — replace fuel pump — connections — wires
8. Repair — replace — connect wiring harness
9. Replace injector(s)
10. Repair — replace damaged — worn engine components
11. Replace stator
12. Replace ECM
Problem: Engine Does Not Start (Fuel Does Not Ignite)
Condition Remedy
1. ECM/CCU trouble code
2. Spark absent
3. Fuel contaminated
4. Primary compression low
5. Secondary compression low
6. Engine flooded
7. Sensor(s) faulty
1. Service — replace problem component
2. Check for spark — see No Spark at Spark Plugs sub-section
3. Replace gasoline
4. Service engine
5. Service engine
6. Clear engine (hold throttle full-open)
7. Repair — replace problem sensor
Problem: Engine Does Not Idle
Condition Remedy
1. ECM/CCU trouble code
2. Throttle position senso r idle adjustments incorrect
3. ISC faulty
4. Reed petals chipped or broken
5. Injector(s) faulty
6. Fuel pressure regulator faulty
7. Air-intake silencer obstructed
8. Exhaust obstructed
9. Primary compression low
10. Secondary compression low
1. Service — replace problem component
2. Adjust idle RPM to specifications
3. Replace ISC
4. Replace reed petals
5. Replace injector(s)
6. Replace regulator
7. Clean air-intake silencer
8. Remove obstruction
9. Service Engine
10. Service Engine