Snowmobile Arctic Cat (2000 year). Instruction - part 36

Problem: Engine Overheats

Condition

Remedy

1. Spark plug heat range too hot

1. Install lower heat-range spark plugs

2. Coolant low—absent

2. Add coolant

3. Carburetors adjusted incorrectly—jetted

incorrectly—dirty

3. Troubleshoot—clean carburetors—jet correctly

4. Carburetor-to-cylinder air leak

4. Replace—repair gaskets—intake flanges

—service intake ports

5. Heat exchangers—no snow for cooling

5. Select new trail—install ice studs to chew up

hard packed snow and ice

6. Rings/grooves carboned

6. Clean—replace rings—pistons

7. Exhaust ports obstructed

7. Remove obstruction

8. Muffler obstructed

8. Remove obstruction

9. Gas/air mixture incorrect

9. Replace jets—adjust jet needle E-clip position

10. Oil-injection pump malfunctioning—

adjusted incorrectly

10. Replace—bleed—adjust oil-injection pump

11. Primary compression (crankcase) low—absent

11. Repair—replace damaged—worn engine

components

12. Ignition timing adjusted incorrectly

12. Time ignition

13. Gasoline octane too low

13. Use 87 minimum octane gasoline

14. Water pump—thermostat damaged—faulty

14. Replace—rebuild water pump—replace

thermostat

Problem: Engine Backfires

Condition

Remedy

1. Throttle/ignition monitor switch adjusted

incorrectly

1. Adjust throttle cable free-play—service spring

2. Spark plugs fouled—damaged

2. Clean—gap—replace spark plugs

3. Spark plug heat range too hot

3. Install lower heat-range spark plugs

4. High tension wires/coil shorting

4. Service—replace high tension wires/coil

5. Carburetor-to-cylinder air leak

5. Repair—replace gaskets—intake flanges

—service intake ports

6. Carburetors adjusted incorrectly—dirty—

damaged—loose

6. Troubleshoot—tighten carburetors

7. Gas/air mixture incorrect—too lean

7. Adjust jetting

8. Oil-injection pump malfunctioning—adjusted

incorrectly

8. Replace—bleed—adjust oil-injection pump

Problem: Engine Four-Cycles (Floods Excessively)

Condition

Remedy

1. Carburetors adjusted incorrectly—dirty—

damaged

1. Troubleshoot—clean carburetors

2. Gas/air mixture incorrect

2. Adjust jetting

3. Oil-injection pump malfunctioning—adjusted

incorrectly

3. Replace—bleed—adjust oil-injection pump

4. Air-intake silencer obstructed

4. Remove obstruction

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Problem: Engine Stops Gradually

Condition

Remedy

1. In-line fuel filter obstructed—damaged

1. Remove obstruction—replace in-line fuel filter

2. Fuel hose obstructed—broken—pinched

2. Remove obstruction—replace—repair fuel hose

3. Head gasket(s) burned out

3. Replace head gasket(s)—service cylinders—

head

4. Cylinder head loosening

4. Tighten cylinder head cap screws

5. Spark plugs loose

5. Tighten spark plugs

6. Impulse hose cracked

6. Replace impulse hose

7. High tension wires/coil faulty

7. Service—replace high tension wires/coil

8. Float bowl vent hose (TM-style) obstructed—

kinked—damaged

8. Service—replace float bowl vent hose

Problem: Engine Stops Suddenly

Condition

Remedy

1. In-line fuel filter obstructed—damaged

1. Remove obstruction—replace in-line fuel filter

2. Fuel hose obstructed—broken—pinched

2. Remove obstruction—repair—replace fuel hose

3. CDI unit faulty

3. Replace CDI unit

4. Ignition coil faulty

4. Replace ignition coil

5. Charge coil (1) faulty

5. Replace coil

6. Charge coil (2) faulty

6. Replace coil

7. Gas-tank vent—hose obstructed—damaged

7. Remove obstruction—replace vent—hose

8. Engine seized

8. Overhaul engine

9. Throttle/ignition monitor switch faulty—throttle

cable adjusted incorrectly

9. Replace throttle control—adjust throttle cable free-play

— adjust—connect—replace carburetor safety

switches (VM-style)

Problem: Engine Fails to Stop (Continues to Run, Even with All Switches Off)

Condition

Remedy

1. CDI unit shorted to ground

1. Replace CDI unit

2. Main wiring harness four-prong connector

disconnected

2. Connect four-prong connector

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Troubleshooting

Engine

(EFI Models)

Problem: Engine Does Not Start (No Spark at Spark Plugs)

Condition

Remedy

1. Ground connections dirty—loose

1. Check all ground connections—clean and tight

2. Throttle/ignition monitor switch

malfunctioning—ignition switch not on

2. Replace faulty switch—turn switch on

3. Wiring harness shorting—disconnected

3. Repair—replace—connect wiring harness

4. Emergency stop switch in DOWN position—

malfunctioning

4. Move switch to UP position—replace throttle

control

5. Throttle/ignition monitor switch malfunctioning

5. Adjust throttle cable tension—replace throttle

body assembly

6. Spark plugs fouled—damaged

6. Clean—replace spark plugs

7. Spark-plug caps damaged—leaking—shorting

7. Replace spark-plug caps

8. High tension leads/coil loose—grounded—

faulty

8. Service—replace high tension leads/coil

9. CDI unit faulty

9. Replace ECU

10. Ignition timing sensor faulty

10. Replace sensor

11. ECU faulty

11. Replace ECU

Problem: Engine Does Not Start (No Fuel at Cylinders)

Condition

Remedy

1. Gas tank empty

1. Fill tank

2. Injector dropping resistor faulty

2. Replace dropping resistor

3. Fuel pressure regulator faulty

3. Replace regulator—hose

4. Gasoline contaminated

4. Replace gasoline

5. Fuel pump faulty

5. Service—replace fuel pump—connections—

wires

6. Fuel hose broken—pinched

6. Replace—service hose

7. Gas-tank vent—hose obstructed

7. Remove obstruction—replace vent—hose

8. Pick-up valve(s) obstructed—damaged

8. Remove obstruction—replace pick-up valve(s)

9. Primary compression absent

9. Repair—replace damaged—worn engine

components

10. ECU faulty

10. Replace ECU

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Problem: Engine Does Not Start (Fuel Does Not Ignite)

Condition

Remedy

1. ECU LED trouble code

1. Service—replace problem component

2. Spark absent

2. Check for spark—see No Spark at Spark Plugs

sub-section

3. Primary compression low

3. Service engine

4. Secondary compression low

4. Service engine

5. Engine flooded

5. Clear engine (hold throttle full-open)

6. Gasoline contaminated

6. Clean tank and entire fuel system

Problem: Engine Does Not Idle

Condition

Remedy

1. ECU LED trouble code

1. Service—replace problem component

2. Throttle position sensor idle adjustment incorrect

2. Adjust idle RPM to specifications

3. Injector(s) faulty

3. Replace injector(s)

4. Fuel pressure regulator faulty

4. Replace regulator—  hose

5. Air-intake silencer obstructed

5. Clean air-intake silencer

Problem: Engine Loses Power or Runs on One Cylinder

Condition

Remedy

1. Sensor faulty

1. Check LED for trouble code—repair—

replace problem circuit or sensor

2. Spark plug fouled

2. Replace spark plugs

3. External coil faulty

3. Service — replace coil

4. Gas tank vent — hose obstructed

4. Service — replace vent hose

5. Secondary compression low

5. Service engine

6. CDI unit faulty

6. Replace ECU

7. Fuel pressure regulator faulty

7. Replace regulator

8. Pick-up valve(s) obstructed — out of position

8. Replace—relocate pick-up valve(s)

9. Oil-injection pump malfunctioning—adjusted

incorrectly

9. Replace—bleed—adjust oil-injection pump

10. Throttle bodies out of synchronization

10. Replace throttle bodies from a similar engine—

if problem is corrected, replace the original
assembly

11. Injector faulty

11. Replace injector

12. Dropping resistor faulty

12. Test resistor—replace as necessary

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