Perkins M250C - Engine Speed Does Not Change; Engine Stalls at Low RPM

50 KENR9126
Troubleshooting Section
4. If there was no obvious signs of a faulty head
gasket proceed
to “Cylinder Head”.
Cylinder Head
1. Check the cylinder head for flatness.
2. Check the mat
ing face of the cylinder head for
faults and signs of leakage. If a fault is found,
replace the cylinder head. If signs of leakage are
found, dete
rmine the cause of the leakage.
3. If the cylinder head is flat and if the cylinder head
does not hav
e any faults, refer to “Cylinder Block”.
Cylinder Block
Inspect the top face of the cylinder block for faults
and signs of leakage. If a fault is found, replace
the cylind
er block. If signs of leakage are found,
determine the cause of the leakage.
Assembly
after Repair
1. Install the cylinder head.
2. Replenish the engine with clean engine oil to the
correct level.
3. Fill the cooling system.
i04012450
Engine Speed Do es Not
Change
Note: Use this procedure only if the engine speed
does not change. This fault will not occur in a
generator set application.
Probable Causes
•
Diagnostic codes
•
Throttlepositionsensor
Recommended Repairs
Diagnostic Codes
Check for active diagnostic codes on the electronic
service tool. T roubleshoot any active codes before
continuing with this procedure.
Use the electronic service tool to check the setup of
the throttle.
Throttle Position Sensor
Refer to Troubleshooting, “Analog Throttle Position
Sensor Circuit - Test” or Troubleshooting, “Digital
Throttle Posi
tion Sensor Circuit - Test” if any of the
following diagnostic codes are active:
•
0091-08 Thro
ttle Position Sensor abnormal
frequency, pulse width or period
•
0774-08 Sec
Throttle Position Sensor abnormal
frequency, pulse width or period
i04010455
Engine Stalls at Low RPM
Probable Causes
•
Diagnostic codes
•
Accessory equipment
•
Fuel supply
•
Electronic unit injectors
Recommended Actions
Diagnostic Codes
Check for active diagnostic codes on the electronic
service tool. Troubleshoot any active codes before
continuing with this procedure.
Accessory E quipment
Check all accessory equipment for faults that may
create excessive load on the engine. Repair any
damaged components or replace any damaged
components.
Fuel Supply
1. Visually check the fuel tank for fuel. The fuel
gauge may be faulty.
2. Ensure that the fuel supply valve (if equipped) is
in the full OPEN position.
3. If the temperature is below 0 °C (32 °F), check
for solidified fuel (wax).
4. Check the primary filter/water separator for water
in the fuel.
5. Check for fuel supply lines that are restricted.