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Просмотр инструкции снегоходы Ski Doo MX Z 2005, страница 899
Section 02 TROUBLESHOOTING GUIDE
Subsection 02 (ENGINE (4-TEC))
ENGINE GENERAL
Symptom: ENGINE BACKFIRES.
1. Check spark plug.
- Carbon accumulation caused by defective spark plug. Clean carbon accumulation and replace
spark plug.
2. 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).
3. Check leakage on intake manifold.
- Air leak on intake system. Retighten screws and/or replace intake manifold gasket.
4. Check exhaust air leaking.
- Exhaust gasket is leaking. Retighten screws and/or replace exhaust gasket.
5. Check intake valve(s) for leaking.
- Intake valve(s) is(are) leaking. Repair or replace valve(s).
6. Check if fuel supply is sufficient at high RPM.
- Fuel line is contaminated and/or bent (engine gets lean). Clean and/or replace defective part(s).
Symptom: ENGINE SUDDENLY TURNS OFF.
1. Check spark plug condition and/or gap.
- Fouled spark plug or wrong spark plug gap. Readjust gap and clean spark plug or replaceplace
pistons. Ask driver to refer to warm-up procedure in Operator’s Guide.
2. 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).
3. Check if fuel supply is sufficient at high RPM.
- Fuel line is contaminated and/or bent. Clean and/or replace defective part(s).
4. 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 inlet/exhaust valve(s). Replace and/or repair
defective parts.
5. Piston seizure.
- Spark plug heat range is too hot. Install spark plug with appropriate heat range (refer to TECH-
NICAL DATA).
- Compression ratio is too high. Install genuine parts.
- Poor oil quality. Use BRP's XP-S recommended oil.
- Leaks at air intake manifold (engine gets too lean). Retighten screws or replace air intake mani-
fold gasket.
- Snow/water intrusion through intake system into combustion chamber. Clean intake system and
replace defective part(s).
mmr2005-020 21
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