How do you diagnose a bad injection pump?
Symptoms of a Bad or Failing Diesel Injection Pump
- Engine may run roughly, or not at all.
- Hard starting.
- Engine misfires.
- Lack of power.
- Excessive smoke from the exhaust.
How do I test my injection pump timing?
By removing deflector from fuel pump
- Take out deflector on both sides of the fuel pump.
- Put hand torch on one side of pump and mirror on the other side.
- The light from torch will be visible on the mirror.
- Turn the engine so that the unit to be check is toward the TDC of compression (at plunger upstroke)
What are the symptoms of a bad fuel injection pump?
Symptoms of a Bad Fuel Pump
- Car Won’t Start. There are a host of issues that could prevent a car from starting, but a lack of fuel is one of the first things to check.
- Sputtering.
- Car Dies Under Heavy Load.
- Inconsistent and Unintended Acceleration.
- Decreased Fuel Efficiency.
- Increased Engine Temperature.
How do I check my VP44?
To do this, connect a fuel pressure test gauge to the Schraeder valve located at the fuel inlet on the VP44, then turn the ignition key to the START position but just bump the starter (do not start the engine) and leave then it in the RUN position. This will cause the lift pump to activate for about 25 seconds.
What causes injector pump failure?
Using subpar or dirty fuel is one of the common reasons that can cause your fuel injector pumps to stop working efficiently or entirely. Overtime residue like gunk and grease can build up inside the fuel system and clog up the entire fuel injector pump.
How do I adjust the timing on my injection pump?
If you decide to alter the fuel injection pump, you’ll need to:
- Use a socket wrench on the front camshaft bolt to hand-turn the engine clockwise until the first cylinder is at TDC.
- Both the intake and exhaust valves should be closed, and the TDC mark should be aligned.
Why do VP44 pumps fail?
The most common mechanical failure of the VP44 pump is rupturing of the diaphragm in the front of the injection pump. The diaphragm ruptures allowing the timing piston to vibrate and damage the front cover until fuel bypasses. The rupturing of the diaphragm is caused by a poorly designed lift pump.
How does a Bosch VP44 pump work?
What is the VP44 and how does it work? The VP44 fuel pump is an electronically controlled rotary fuel injection pump; the pump controls the injection quantity & timing of the fuel injection. The pump generates a great amount of heat while creating these injection pressures and the TCV also gets extremely hot.
What kind of injection pump does Robert Bosch use?
The Robert Bosch VE-type injection pump is used on a variety of vehicles and is made under licenses by other manufacturers (Diesel Kiki and Nippondenso). The Bosch VE pump is primarily found on compact and automotive diesel engines. The code designation on the side of the pump is read:
What do the numbers mean on Bosch VE pump?
The Bosch VE pump is primarily found on compact and automotive diesel engines. The code designation on the side of the pump is read: Example: NP-VE x/x F xxxx A R NP xx NPThese two letters stand for the manufacturer, in this case, Diesel Kiki VEDistributor-type injexction pump xnumber of cylinders xplunger diameter in millimeters
Where is the governor on a Bosch injection pump?
At the top of the injection pum is a control lever (C), a control-lever shaft (D), and an overflow (retun fuel) valve. Engine idle RPM and maximum speed can be adjusted by the idle-speed adjusting bolt and maximum-speed adjusting bolt. Under the top cover is the governor mechanism. FIGURE 1: Cutaway of VE injection pump showing component location.
Where is the delivery valve on a Bosch pump?
Mounted outside the distributor head is a delivery valve (N) for each cylinder, fuel-cut (fuel shutoff) solenoid, and an air-bleed screw in the center. At the top of the injection pum is a control lever (C), a control-lever shaft (D), and an overflow (retun fuel) valve.