How much pressure does a diesel injector carry?

Article by: Ángela Granado Jr. | Last update: April 10, 2022
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Currently, the maximum pressures are between 1,500 and 2,000 bar. In order to produce so much pressure, they must be very robust elements, just like the pipes that transport the fuel at said pressures.

How much pressure does an injector carry?

Injection pumps, until a few years ago, have been generating pressures around 1,000 bar. Currently, the maximum pressures are between 1,500 and 2,000 bar.

How is the pressure of the injectors measured?

The measurement must be carried out directly on the high pressure pump, on the screw that the pump itself has for this purpose. This method is effective because the pressure in the high-pressure pump during start-up is similar to that in the feedback loop.

How to know if a diesel injector is bad?

The most common symptoms that we can find are:

Light on the dashboard of the car. … Engine power loss. … Jerks when walking. … black smoke. … Noises in the engine. … Fuel leak.

How to measure the fuel pressure of a diesel engine?

Identifies the fuel supply line on the engine. Identify the pressure take-off valve on the injector rail and open it. If there is no pressure tap valve, connect a By-pass line to the supply line. Connect the manometer.

17 related questions found

What is the fuel pressure?

Fuel pressure is one of the main parameters to be controlled in an injection system. This control is carried out by locating a corresponding pressure gauge in a port intended for this purpose in the injection rail. This reading must be in accordance with the catalog measurement for each model, for this …

What happens if a diesel injector does not work?

The pressure at which the injectors work will cause wear on the nozzle orifices and this will cause poor fuel spraying, even dripping (although they tend to be damaged beforehand due to the accumulation of carbon from combustion, which causes obstruction of the holes).

What happens when a diesel injector fails?

If the fault is already something much more exaggerated (which should not be normal), we will notice it when driving: the car will jerk and will have a loss of power, in addition to generating the white smoke that we have mentioned before. Fuel quality is critical, especially for diesel injectors.

What happens if an injector does not work?

The injectors are the ones that are responsible for feeding fuel to the car’s engine, and they are pieces with extreme precision. The breakdown that most often affects them is that they get clogged. And when this happens, we may notice symptoms such as altered fuel consumption or jerks when accelerating.

How many bars does a gasoline pump have?

An electric fuel pump is capable of working at a pressure of between 3 and 4.5 bars, although there are some that reach up to 5.8 bars.

When to change diesel injectors?

The injectors are not usually changed unless it is appreciated that they have a problem that requires changing them. What you should do regularly is clean the injectors of your car around 50,000 kilometers or if 2 years have passed since the last time you cleaned them.

How do I know if I have dirty injectors?

Jerking and loss of power, rough idle

It is the most common symptom of dirty or poorly maintained injectors. Rough idle, especially when hot, is one of the most obvious.

How long do diesel injectors last?

Fuel injectors will last between 80,000 and 130,000 kilometers. How long the injector lasts has a lot to do with the type of gas used in the car and how often the various fuel filters are changed.

What if the fuel pressure is too high?

If the amount of fuel is not properly regulated by the fuel pump, a car could be drowned by fuel. – The car jerks. If the car jerks during acceleration it could be a problem with the fuel pressure.

What voltage should reach the fuel pump?

Normally, the voltage at which the Fuel Pump of a car works is 12 V and it is activated through the relay of the pump.

How to know if the fuel pump has no pressure?

How to know if there are faults in the fuel pump?

The vehicle does not start or starts sporadically. … Jerks on acceleration and idling … Engine misfires and intermittent noises. … Overall check. … Checking the spark plugs. … Checking the timing chain.

What if the fuel pressure is low?

lack of strength

A faulty fuel pump will cause you to lose power when the car is under stress, for example, on an uphill drive, with a heavy load, or under acceleration. Due to low pressure, the engine receives insufficient gasoline to perform these difficult tasks.

What problems do dirty injectors give?

When the injectors are dirty or damaged, it is possible that the injector nozzle becomes partially clogged, affecting its operation. This causes fuel injection to be performed improperly, leading to poor and unstable idling. Strong smell of fuel.

When should the injectors be cleaned?

It is important to clean the injectors if it is detected that the power delivery of the car is not working correctly or we notice jerks during acceleration. It is also recommended to clean the injectors after 100,000 km if it is the first time, or every 50,000 km the subsequent times.

How can the injectors be cleaned?

Three different ways to clean the injectors are described below:

– Cleaning with additives. These additives are added directly to the tank, where they mix with the fuel. … – Cleaning by sweeping. … – Ultrasonic cleaning.

When are diesel injectors cleaned?

It is recommended to clean the injectors, regardless of whether it is a diesel or gasoline engine, every 50,000-60,000 kilometers. Most injectors last longer, but if you do it later you could find that they are clogged and cleaning would be much more complicated.

How much does it cost to check injectors?

On average, the price per injector ranges between €250 for a gasoline injector and €500 for a diesel one, to which labor must be added.

Why do injectors fail?

Generally, the pressure at which the fuel comes out wears down the holes, which can lose their original shape and spray poorly. Its wear is accelerated by using poor quality fuels or by not doing the correct maintenance on the fuel filters.

What happens if the injectors of a car are clogged?

These by covering the injector reduce the amount of gasoline that atomizes, which could cause the engine to work more and misfire, wobble or stop. An injector is no longer a gasoline sprinkler nozzle.

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