The pressure in the car's fuel system is an important parameter used to diagnose the power unit. Reducing or increase in pressure affects the behavior of the vehicle in different modes of its operation. Special attention deserves reduced pressure in the system.

Fuel system diagram VAZ 2110

Signs of reduced pressure in the fuel ramp VAZ 2110

Weak pressure, first of all, is expressed by the presence of failures. The driver tries to disperse, presses the gas pedal, but nothing happens. In this case, the motor stop helps, and its subsequent launch (so the pump shakes fuel). But after 10 or 15 kilometers the situation is repeated.

How to clarify the diagnosis: on car service or do it yourself

To clarify the diagnosis, it is necessary to measure the pressure in the fuel ramp. This can be done in any car service. This service is inexpensive - about 500-600 rubles. However, the pressure can be measured independently, especially since there is nothing complicated.

How to check the pressure using a gauge from the tire pump

It will only require a pressure gauge designed to measure tires. But it needs to be modified a little, changing the scale. In the injection system it is desirable to measure pressure with a scale of the device that shows varying within six to seven atmospheres. There are other, more advanced devices for measuring. Specialized instrumental set with a pressure gauge, a drain hose and an adapter can be bought at the auto parts store. It costs about 1.5 thousand rubles.

Anyway, the experienced motorist should have its pressure gauge among the tools. And if he is purchased, the driver gets a variety of adapters with it, which allow you to measure pressure on various brands of cars. In addition, purchased pressure gauges are equipped with a better scale that allows you to more accurate pressure. As for the professional pressure gauge, it is generally a find, since among other things it allows you to reset the residual pressure in the system, and this increases the accuracy of the testimony.

However, if you still decided to apply homemade pressure gauge, remember:

• It is advisable to apply a standard air vaza pressure gauge, since it can also be measured by oil pressure (you only need to unscrew the fitting).
• It is important to use high-quality clamps, to avoid passes.
• Instead of an adapter, you can use an ordinary threaded fitting.

Measures are carried out in this way:

• Often, measurements are performed when the ignition is turned on. It is necessary to check whether the arrow jumped compared with the standard value.
• Also, measurements are carried out in XX mode.
• It is necessary to perform measurements with a discarded RTD and a "return".

What pressure is considered the norm

In the fuel system "dozens" pressure in the norm should be 2.8-3.2 atmospheres.

Possible malfunctions

the feeding line of fuel is scored, how to eliminate the blockage

The sensor fault that adjusts the fuel pressure is directly before injection and clogging the fuel line, can also serve as low pressure reasons. To reliably learn the reason, due to which the pressure rides, it is necessary to perform competent measurements. First measure the pump pressure, then highway, and then check the pressure in the ramp itself. This will detect a specific reason.

zavor fuel injectors how to eliminate

There are a number of symptoms for which you can determine that fuel injectors are contaminated:

• Masted motor launch.
• Unstable engine operation.
• Dips during a sharp press on the gas pedal.
• Power loss and deterioration of overclocking dynamics.
• Increase the toxicity of exhaust gases.
• Increase fuel consumption.
• The emergence of detonation.
• Cotton in the release system.
• Skip ignition.

The fault is eliminated by cleaning fuel injectors.

scored valve how to check and eliminate

If the valve is scored, the fuel passes tight, because of which it begins to flow from everywhere. If you have noticed that fuel consumption has increased significantly, change the regulator, since it is the leading component - the valve is clogged completely and the fuel is not supplied to the feed system.

jammed valve how to check and eliminate

If the pressure in the system is uneven, this is usually ensured by the valve enclosure. At the same time, the car has an uneven move and twitch either stalls at all.

Tips Pros: How with the help of spark plugs check the fuel system

There is one simple way to check the fuel system using spark plugs. Open the hood and carefully inspect the candles. If they are wet, then gasoline is accurate. If the candles are dry, then fuel is most likely not served and must be diagnosed with the fuel system.