Ski-Doo Ski Doo SUMMIT 2005 [901/1429] Engine cranks but fails to start

Ski-Doo Ski Doo MX Z 2005 [901/1429] Engine cranks but fails to start
Section 02 TROUBLESHOOTING GUIDE
Subsection 02 (ENGINE (4-TEC))
Symptom: ENGINE DOES NOT OFFER MAXIMUM POWER AND/OR DOES NOT REACH
MAXIMUM OPERATING RPM.
(contd)
7. Perform engine leak test. Refer to ENGINE LEAK TEST procedure. Check for possible pis-
ton seizure.
- Damaged head gasket and/or seal and/or leaking intake/exhaust valve(s). Replace and/or repair
defective parts.
Symptom: ENGINE CRANKS BUT FAILS TO START.
1. Check fault codes in B.U.D.S. system.
- Check if electrical actuator(s) is/are defective. Replace defective part(s) (refer to COMPONENT
INSPECTION AND ADJUSTMENT).
2. Check if stick coil fits on spark plug (refer to spark plug).
3. Check spark plug.
- Define spark plug (no spark) or wrong spark plug gap. Readjust gap and clean spark plug or
replace.
4. Check for fuel on spark plug.
- Flooded engine (spark plug wet when removed). Activate engine drowned mode and crank en-
gine with rags over the spark plug holes (refer to OVERVIEW in EMS system).
5. Check battery voltage.
- Battery is discharged and starter works not properly. Charge battery.
6. Check engine compression.
- Insufficient engine compression. Replace defective part(s) (ex.: piston, ring(s), etc.).
7. In cold weathers, check engine decompressor (located on camshaft sprocket/timing gear).
- Centrifugal weight spring is not engaged and/or damaged. Readjust spring or replace centrifugal
weight if damaged.
Symptom: ENGINE DOES NOT START NO SPARK AT SPARK PLUG (REFER TO ENGINE
MANAGEMENT SYSTEM).
1. Check fault codes in B.U.D.S. system.
- Check if electrical actuator(s) is/are defective. Replace defective part(s) (refer to COMPONENT
INSPECTION AND ADJUSTMENT).
2. Verify spark plug condition.
- Defective, improperly set, worn out, fouled. Identify source of problem and correct. Replace
spark plug.
3. Check stick coil (refer to COMPONENT INSPECTION AND ADJUSTMENT).
- Defective part. Replace stick coil.
4. Check crankshaft position sensor (refer to COMPONENT INSPECTION AND ADJUSTMENT).
- Defective crankshaft position sensor. Corroded connector terminals. Replace crankshaft posi-
tion sensor. Clean terminals and apply silicone dielectric grease.
5. Check condition of wiring harness and connectors.
- Cables and/or connectors are damaged and/or corroded. Replace connectors or complete wiring
harness (refer to COMPONENT INSPECTION AND ADJUSTMENT). Clean terminals and apply
silicone dielectric grease.
mmr2005-020 23

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