What should fuel pressure be on Sprinter diesel?
What should fuel pressure be on Sprinter diesel?
When checking the fuel pressure solenoid there should be no fuel coming out the return during cranking, and it should hold 870-1450 psi when unplugged during cranking. If it doesn’t, and the injectors are OK, then the fuel pressure solenoid is bad.
How does the high pressure pump in a sprinter work?
The high pressure pump builds the high pressure and delivers it to the fuel rail manifold, which buffers out pressure fluctuations and distributes fuel to the individual injectors. The fuel quantity valve (fuel control actuator, M-Prop) in the high pressure pump controls pressure output from the pump.
When to replace fuel pressure solenoid on sprinter?
If it is and there is leakage, replace the fuel pressure solenoid. The high pressure pump is driven by the camshaft, and requires no timing. Fuel that enters the high pressure pump is pressurized between 200-1600 bar (2,900 – 23,205 psi). The pressurized fuel is then supplied to the fuel rail.
Is there a relative compression test for sprinter?
There is a relative compression test available using the wiTECH scan tool. Acceptable values between two cylinders must be equal to or less than 15 rpm. Restricted or aerated fuel supply to the high pressure pump. Actual versus desired too far apart, map the fuel pressure graph, if you have a fluctuation over 500 psi this may cause a surge.
When checking the fuel pressure solenoid there should be no fuel coming out the return during cranking, and it should hold 870-1450 psi when unplugged during cranking. If it doesn’t, and the injectors are OK, then the fuel pressure solenoid is bad.
The high pressure pump builds the high pressure and delivers it to the fuel rail manifold, which buffers out pressure fluctuations and distributes fuel to the individual injectors. The fuel quantity valve (fuel control actuator, M-Prop) in the high pressure pump controls pressure output from the pump.
If it is and there is leakage, replace the fuel pressure solenoid. The high pressure pump is driven by the camshaft, and requires no timing. Fuel that enters the high pressure pump is pressurized between 200-1600 bar (2,900 – 23,205 psi). The pressurized fuel is then supplied to the fuel rail.
Is there a Mercedes diesel injector for sprinter?
“Here at the Global Sprinter Research Center I am always eager to investigate Sprinter related technical issues.
What to do if fuel is leaking from the injector?
Excess leakage from the injector is returned to the tank, it is not an external fuel leak. Per Chrysler, unplug the cam sensor and fuel rail pressure solenoid, and plumb the individual injector returns in to graduated vials. Run the cranking Fuel Quantity Test with a scan tool.
What to do if fuel comes out of solenoid while cranking?
There should be no fuel coming out of the solenoid while cranking. Perform the fuel rail pressure solenoid leak quantity test to determine if it is faulty. If the injectors check good, the fuel pressure solenoid should hold 870-1450 psi when unplugged during cranking. Buy Replacement Fuel Pressure Solenoid CMP and CKP Sensors must be in sync.
Why do I need to replace my fuel injection injector?
Injector hold down bolts must be replaced if they are removed, they are a torque to yield bolt. If not, they could stretch and allow combustion gasses to blow past the injector, which can overheat the injector and cause it to fail. There is a relative compression test available using the wiTECH scan tool.
Where is the pressure regulator on a sprinter?
Pull out the fuel pressure regulator from the end of the fuel rail. Keeping the device clean, remove both the green O-ring and fibre backing ring from the tip of the regulator and replace with new components. Refit the regulator assembly to the rail.
Pull out the fuel pressure regulator from the end of the fuel rail. Keeping the device clean, remove both the green O-ring and fibre backing ring from the tip of the regulator and replace with new components. Refit the regulator assembly to the rail.
