Liangzi Power UTV1000-3, Maintenance Manual

Page: 183 / 184

11. TROUBLESHOOTING
11- 13

Intake valve(s) is (are) leaking. Repair or replace valve(s).
5. Check if fuel supply is sufficient.

Fuel line is contaminated and/or bent (engine gets lean). Clean and/or
replace defective part(s).
6. Check engine ground.

Poor engine ground. Clean.
Symptom: ENGINE DOES NOT OFFER MAXIMUM POWER AND/OR DOES NOT REACH
MAXIMUM OPERATING RPM
1. Check spark plugs condition and/or gap.

Fouled spark plugs or wrong spark plug gap. Readjust gap and clean spark
plugs or replace.
2. Check spark plugs type.

Improper spark plugs heat range. Install recommended spark plugs (refer
to TECHNICAL SPECIFICATIONS).
3. Perform engine leak test.

Damaged head gasket and/or seal and/or leaking intake/exhaust valve(s).
replace and/or repair defective parts.
4. Check for water in fuel (wrong fuel).

There is water in fuel or wrong fuel. Drain fuel system, search for leakage
and refill it with appropriate fuel.
5. Check engine compression.

Worn piston(s) and/or piston ring(s). Replace defective part(s).+
6. Check fuel pressure.

Low fuel pressure. Perform fuel pressure test (refer to FUEL SYSTEM).
7. Check air intake system.

Air filter is clogged due to contamination. Replace air filter.
8. Check if EMS (engine management system) is in limp home mode. Check fault
codes in DELPHI. system.

Check if electrical actuator(s) is/are defective. Replace defective part(s).
9. Check drive belt.

Worn. Replace belt if its width is less than specified.
Symptom: HIGH ENGINE OPERATING TEMPERATURE
1. Check if cooling system shows any failure (see COOLING SYSTEM).

System is leaking. Repair and/or replace damaged part(s).
2. Check function of lubrication system (see LUBRICATION SYSTEM).

Lubrication is not working properly. Repair and/or replace damaged
part(s).
3. Check condition and heat range of spark plugs.

Melted spark plug tip or inadequate heat range. Replace.
4. Check air leakage on engine intake.

Leakage causes overheating. Replace/repair damaged part(s).
5. Check air inlet and outlet of the CVT cover.

Air circulation is clogged (overheating). Clean air circulation from