Poor Acceleration (Insufficient Output) - Kubota V3800-CR-TE4 Diagnosis Manual

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

(7) Poor Acceleration (Insufficient Output)

Possible causes:
1. Fuel feed pump operation fault
2. Large driving resistance due to problems in the machine itself that do not involve the engine
• Large resistance for actuation
• Tire air pressure
• Power transmission fault
• Brake drag
*Refer to the previous "List of malfunction causes by symptom" for the subsequent details.
3. Engine fault
• Low compression pressure
• Engine internal fault
• Valve clearance fault
• Valve timing fault
• Engine oil viscosity fault
4. Control system
• Damage to the pulsar gear of the crankshaft position sensor
• Air gap of the crankshaft position sensor is large
• Accelerator position sensor misadjustment
• SCV operation fault
5. Intake system
• Air cleaner clogging
• Leak from the intake system parts
• Turbocharger operation fault
6. Fuel system
• Supply pump learning has not been performed
• Fuel quality
• Fuel pressure limiter fault
• Fuel line clogging, leak
7. CRS (including related parts)
• Output system (supply pump, injector and common rail)
• Input system (sensors) *A cause for larger injection quantity
• ECU
8. Others
• Power transmission fault
• Large amount of drag (including the brakes, etc.)
• Defective CAN communication
1. Check the Fuel Feed Pump Operation
1. Turn the key switch ON and check that the fuel feed pump is
operating.
Factory
Operates when the key switch is turned ON.
specification
OK Go to "2. Check the DTC".
NG Check in accordance with "6.[2] FUEL SYSTEM INSPECTION
PROCEDURE - 5. Check the Fuel Feed Pump". (Refer to page 1-S291)
(1) Fuel Feed Pump
1-S45
COMMON RAIL SYSTEM
9Y1200192CRS0866US0
[A] M60 Series
[B] M-GX Series
9Y1200192CRS0872US0
KiSC issued 05, 2012 A