What should fuel pressure be when replacing CP3?
Cleanliness CAN NOT be over-emphasized when installing your new pump. Leave all fuel port covers in place until ready to connect lines. WARNING! Whenever dealing with high pressure fuel from the CP3, use caution. At idle, the CP3 is making approx 6800 psi of fuel pressure.
What causes a CP3 pump to start low?
High-Pressure Injection Pump (CP3 Pump) Most starting problems due to low pressure are caused by bad injectors as a result of erosion of the check ball seat. The pressure is supposed to default to a max of 26,107 PSI when you unplug the fuel control actuator.
When does a CP3 pump need to be replaced?
The pump cannot build an adequate amount of pressure if the injection system has a leak. The high-pressure pump will most likely need to be replaced if dirt and/or water has contaminated the pump.
How does the rail injector in a CP3 pump work?
The fuel pressure regulator or fuel control actuator in the high-pressure pump, controls rail pressure. The injectors have a hollow check ball which holds that rail pressure until the fuel solenoid is actuated by the ECM. This allows the check ball to rise off it’s seat and prompts an injection to take place.
High-Pressure Injection Pump (CP3 Pump) Most starting problems due to low pressure are caused by bad injectors as a result of erosion of the check ball seat. The pressure is supposed to default to a max of 26,107 PSI when you unplug the fuel control actuator.
Cleanliness CAN NOT be over-emphasized when installing your new pump. Leave all fuel port covers in place until ready to connect lines. WARNING! Whenever dealing with high pressure fuel from the CP3, use caution. At idle, the CP3 is making approx 6800 psi of fuel pressure.
The fuel pressure regulator or fuel control actuator in the high-pressure pump, controls rail pressure. The injectors have a hollow check ball which holds that rail pressure until the fuel solenoid is actuated by the ECM. This allows the check ball to rise off it’s seat and prompts an injection to take place.
The pump cannot build an adequate amount of pressure if the injection system has a leak. The high-pressure pump will most likely need to be replaced if dirt and/or water has contaminated the pump.