As we all know, a properly performance fuel pump is vital to the health of your diesel engine overall. But, like any other component in your engine, you might have a failure. Then, how practice you know when it's your fuel pump that'southward giving you problem? What symptoms should you wait out for?
Today, we're taking you through the unlike types of fuel pumps and what issues you might take if y'all're experiencing a failure. Read on to acquire more than!
Failures in a Rotary Pump
A rotary pump describes a pump where the output lines are positioned in a circle. Information technology has a distributor on, which is turned by the drive shaft. At that place are different versions of rotary pumps, some electronic and some not.
And then what should you lot keep an middle out for? The following symptoms could point a declining rotary pump:
- Difficult starting time or hot head
- No throttle control or elevated RPM ring (This is more than for a Stanadyne or Roosa Master, covering a certain style through those companies.)
- Seized head or plugged nozzle
- Fuel in the oil
- Oil in the fuel
- Carbon in the fuel
- External fuel leaks
- With a no start on an electronic pump, in that location could be a problem with the electronic shutoff solenoid
- Throttle alarm or shutoff arm leaking
- Leaking head
- Leaking advance
- Clothing from ultra depression sulfur (Since in that location's no lubrication in the fuel, you go metallic parts that just wear on each other constantly
Failures in an Inline Pump
As you can probably judge, all the lines in an inline pump are positioned in a direct line. Each cylinder is operated on its own, so they tin fail separately. Symptoms of a failing inline pump can include:
- Fuel in the oil
- White smoke from a timing issue or air
- Black fume from timing problems, a lack of air, or excessive fueling
- Blue smoke from unburnt fuel
- Low ability acquired by governor issues, lack of fuel, or a bad transfer pump
- No start because of a sticky rack, bad barrel plungers, or, if it'due south electronic, the shutoff solenoid might not work well
- No RPM control because the rack is sticking or the governor is shutting off early
- Cylinder not pumping fuel caused past a delivery valve holder that got over-torqued
- Article of clothing from ultra low sulfur
Failures in a High-Pressure level Common Runway Pump
A high-force per unit area common runway pump is similar to a HEUI pump in that it has pistons that circumduct, and it has one inlet and one or two outlets. The outlets lead to a rail that supplies the pressure. Where an inline or rotary pump applies a specific amount of pressure, the common rail handles the pressure and the ECU handles the fuel distribution.
If you lot're having a failure in your loftier-pressure level common rail pump y'all might observe some of the post-obit symptoms:
- They might quit entirely. This might occur if you go out them sit for a long period of time. Normally, in this situation, information technology would be the suction side that fails. A lot of them accept a supply pump built in that sucks fuel from the tank and that'south the office that tin can go bad
- They can go wear from ultra low sulfur
- The pressure regulator fails. You lot might notice a hiccup in the engine as the force per unit area bounces too much (400 or more psi where it would typically only bounce about 200 psi)
- It goes into limp manner when when the engine is under load, which tin can exist acquired by a fuel restriction or weak pump
- No start issue caused past an injector staying open. While it might appear so, this isn't actually an issue caused by the pump
Failures in a HEUI Pump
A HEUI pump is actually quite similar to a loftier-pressure common rail pump, although information technology's an oil pressure level pump. Its pressure isn't as high, though. Information technology merely goes to a few thousand pounds.
So, if you have a HEUI pump in your engine, what should you scout out for? Some symptoms of a failing HEUI pump include:
- No offset, which can be caused by low oil pressure from an injector sticking open, or by an oil leak beyond the pump. If it doesn't brand the necessary pounds of force per unit area, it won't start
- The IPVR tin fail because of a loose nut. This can cause a stall. Or, the nut can slide back and along every time the brakes are hit, and it can fail
- Yous can become foam in the oil acquired by the incorrect kind of oil. If this happens, it pressurizes differently and tin lead to bug
- Low fuel pressure can occur if proper oil change intervals aren't followed
- High force per unit area oil leaks (cheque your oil manifolds)
- They can become wear from ultra low sulfur
Like with whatever event in you diesel engine, proper diagnosis is key to fixing your problem. If you believe that y'all're having an effect with your pump, DFI can help!
Need help diagnosing your diesel fuel engine problems? Our Bosch Certified Diesel fuel Technicians can help! Give us a call at (855) 212-3022.
