PROBLEM
Starter is turning engine smoothly,
but engine runs irregularly after
starting
Engine runs irregularly
Engine speed drops
Engine does not stop on command
Engine exhaust smokes
W-GV/2, W-GV/3, W-GV/3+, W-GV 8, W-GV 10 and W-GV 15 — June 2017 — EN
CAUSE
Blocked injector
Wrong valve clearance
Low compression because of dirty valves
Loss of compression by wear out or
damage
Faulty glow plug
Unsuitable or contaminated fuel
Lack of fuel
Air in the fuel pipes
Choked fuel filter
Disturbances on the electrical system/
user side
Faulty fuel lift pump
Choked air filter
Lack of air
Choked exhaust system, exhaust blocked
Faulty actuator
Blocked injector
Wrong valve clearance
Lack of fuel
Genverter overloaded
Fuel problem
Too much oil.
Lack of intake air.
Choked exhaust system, exhaust blocked.
Faulty actuator
Defective alternator (windings or other)
Damaged engine
Fuel solenoid is not switching off
Loss of control
Faint blue smoke - generally the result of
light load
Heavy blue smoke - caused by lubricating
oil: oil level too high, worn cylinder,
stuck, broken or worn piston rings.
When the engine RPM is ramping up to
react at a load step some smoke may be
unavoidable.
Wrong setting of minimum RPM.
Sooty
black
smoke
combustion caused by: overload, choked
air filter, air inlet temperature too high,
unsuitable fuel or water in fuel.
Valve clearance incorrect.
SOLUTION
Have the injector tested and cleaned if necessary
Adjust valve clearance
Contact WhisperPower service department for
advice
Repair by WhisperPower service
Replace faulty glow plug. Consider replacing both
or all three taking into account the number of
starts completed.
Fill up with fuel or replace by better quality
Bleed air from fuel system (refer to maintenance
section)
Check fuel filter and replace if necessary
Check if electrical load is fluctuating
Check and repair or replace
Check the air intake
Check the exhaust piping, inspect inside of
manifold
Replace faulty parts. Contact WhisperPower
service department for advice.
Have the injector tested and cleaned if necessary
Adjust valve clearance
Check fuel supply system: fuel pump and filter
Reduce the electrical load (switch off some
consumers)
Check fuel supply and clean fuel filter
Drain oil to proper level
Check air intake; clean air filter
Check the exhaust piping; inspect inside of
manifold
Contact WhisperPower service department for
advice
Genverter must be sent to manufacturer for repair
of damaged bearing or winding
Repair by WhisperPower service
Faulty Digital Diesel Control unit. Stop the engine
manually using the stop handle.
Check wire connections to stop solenoid. Check
solenoid valve function. Replace if necessary.
Increase load.
Check the oil level
Check the compression
No action required.
Readjust minimum rpm setting
Check the fuel.
–incomplete
Check for overload
Check the air filter
Adjust minimal RPM setting
Readjust valve clearance
TROUBLESHOOTING
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