High Fuel Consumption; Usage Habits Of The User Or Use Of Non-Standard Parts; Powertrain Malfunctions Not Involving The Engine - Kubota V3800-CR-TE4 Diagnosis Manual

V3800-CR-TE4,V3800-CR-TIE4, DM

(6) High fuel consumption

Possible causes:
Reduced engine performance is detected and the fuel consumption is higher for this reason.
1. The engine performance is reduced and the fuel consumption is higher for this reason
Reduced engine performance is not detected but the fuel consumption is higher.

1. Usage habits of the user or use of non-standard parts

• Not the standard specification
– Tires, wheels
– Intake / exhaust system parts
• Used for a long time under poor fuel consumption conditions
– Engine used for a long time under a high load
– Long idling time
• Frequently used under driving conditions with a large injection quantity
– Low mileage for each drive (frequently used before the engine has warmed up)
• Faulty maintenance
– Engine oil (dirt)
– Air filter, fuel filter (dirt, clogging)
– Radiator clogging

2. Powertrain malfunctions not involving the engine

• Large driving resistance
– Large resistance for actuation
– Tire air pressure
– Brake drag
• Clutch slipping
3. Fuel feed pump operation fault
*Refer to the previous "List of malfunction causes by symptom" for the subsequent details.
4. Engine fault
• Low compression pressure
• Engine internal fault
• Valve clearance fault
• Valve timing fault
• Engine oil viscosity fault
5. Control system
• Damage to the pulsar gear of the crankshaft position sensor
• Air gap of the crankshaft position sensor is large
• SCV operation fault
6. Intake system
• Air cleaner clogging
• Leak from the intake system parts
• Turbocharger operation fault
7. Fuel system
• Supply pump learning has not been performed
• Fuel quality
• Fuel pressure limiter fault
• Fuel line clogging, leak
8. CRS (including related parts)
• Output system (supply pump and injector)
• Input system (sensors) *A cause for larger injection quantity
1-S39
COMMON RAIL SYSTEM
9Y1200192CRS0865US0
KiSC issued 05, 2012 A