Fuel and Fuel system

                                   Fuel and fuel system

INJECTORS

To test your injectors, you have different ways, u can use noid light, multi meter or use a screw driver to hear the injectors moving or spraying.

The primary difference between carburetors and fuel injection is that fuel injection atomizes the fuel by forcibly pumping it through a small nozzle under high pressure, while a carburetor relies on suction created by intake air rushing through to draw the fuel into the airstream.

Reflection

When using the Noid light, you need to disconnect the sensor wire and plug the noid light in, if it keeps flashing then its defiantly working. And need to check the sensor wire, it should be around 5v. Injectors also need to spray equally, if its blocked up then you need to replace it.

Testing Emissions

Catalytic converter

The catalytic converter is a device placed in the exhaust pipe, which converts hydrocarbons, carbon monoxide, and NO_x into less harmful gases by using a combination of platinum, palladium and rhodium as catalyst.

Exhaust Gas Recirculation

Exhaust neither burns nor supports combustion, so it dilutes the air/fuel charge to reduce peak combustion chamber temperatures. This, in turn, reduces the formation of Nitro oxide

Fuel Pump

A fuel pump is a frequently (but not always) essential component on a car or other internal combustion engine device. Many engines (older motorcycle engines in particular) do not require any fuel pump at all, requiring only gravity to feed fuel from the fuel tank through a line or hose to the engine. But in non-gravity feed designs, fuel has to be pumped from the fuel tank to the engine and delivered under low pressure to the carburetor or under high pressure to the fuel injection system. Often, carbureted engines use low pressure mechanical pumps that are mounted outside the fuel tank, whereas fuel injected engines often use electric fuel pumps that are mounted inside the fuel tank (and some fuel injected engines have two fuel pumps: one low pressure/high volume supply pump in the tank and one high pressure/low volume pump on or near the engine).

Diesel Glow Plug

Glow plugs can be tested by, taking the glow plug out and putting 12volts on it. And if it is working well it should get bright red within 10 seconds.

The engine is unable to start, because it cannot generate and maintain enough heat for the fuel to ignite. For that reason indirect injected diesel engines are manufactured with glow-plugs in each pre chamber, and direct injected diesel engines are manufactured with glow-plugs in each combustion chamber to heat up the air.

Fuel Pressure regulator

SENSORS

Map:  The manifold absolute pressure sensor (MAP sensor) is one of the sensors used in an internal combustion engines electronic control system. Engines that use a MAP sensor are typically fuel injected. The manifold absolute pressure sensor provides instantaneous manifold pressure information to the engine's electronic control unit (ECU).

Maf: A mass air flow sensor is used to find out the mass flow rate of air entering a fuel-injected internal combustion engine. The air mass information is necessary for the engine control unit (ECU) to balance and deliver the correct fuel mass to the engine

Tps: A throttle position sensor (TPS) is a sensor used to monitor the position of the throttle in an internal combustion engine. The sensor is usually located on the butterfly spindle so that it can directly monitor the position of the throttle

Bleeding Diesel Engine

Here are the steps to take in bleeding air from a diesel fuel system:

1. Turn off fuel valve.

2. Clean outside of filter housing.

3. Install new filter element and new gaskets. A little oil on the gasket will aid a tight

seal.

4. I'd suggest that you fill a spin-on filter with clean fuel before installation.

5. Open the bleed plug on the filter closest to the fuel tank.

6. Open fuel supply valve so that the fuel is available to the filter and pump.

7. Most all equipment has a hand priming pump lever to pump fuel through the system

and replace trapped air. (Check operator's manual.) Pump several times until full

flow, without air bubbles, escapes from the bleed plug holes.

8. You may need to bleed filters, fuel pump and lines to the injectors.

9. Close bleed plugs after all air is removed from the fuel tank, filters, settlement bulb,

and fuel pump (only one at a time working through all bleed screws beginning closest

to tank and ending at nozzles if necessary).

10. Try the engine; if it doesn't start or runs poorly, you may have to bleed the injection

line.

11. Loosen injection lines at the injectors about one turn. The use of two wrenches will

prevent the binding or twisting of the steel lines. Usually, it is enough to bleed just half

of the lines at a time.

12. Crank the engine until all air is forced out and fuel is present.

13. Engine will start to pop on one or two cylinders.

14. Tighten the injector lock nut one at a time to tell by sound which cylinders are firing

properly.

15. Run the engine until it runs smoothly. This will bleed the other injectors.