The fuel supply pressure in the pressure pipeline is maintained for a long time. The fuel pump is closed by a non-return valve, and the fuel supply pressure is maintained in the line, which reduces the engine start time. Checking the fuel supply pressure must be carried out in the following order. Prepare fixtures «13.3.010», «13.5.220» And «61.3.050», DIS tester and switch off the ignition.
Attention! The fuel in the pipelines is under pressure of about 3.5 bar. Collect spilled fuel and dispose of it.
Take out the plugs (pic. 3.32), unscrew the bolts and remove the protective casing of the injectors and ignition coils. Remove the dust cap from the metering valve of the camshaft.
Assemble fixture «13.5.220» (pic. 3.33), made up of fixtures «13.5.221» And «13.5.222». Unscrew shut-off valve (1) on the kit «13.5.220».
Install tool kit «13.5.220» on the fuel rail gauge valve and hand-tighten the knurled nut. Start the engine.
Attention! It is strictly forbidden to screw in the shut-off valve (1) to the mechanical stop, due to the possibility of failure of the fuel pressure regulator.
Gradually screw in the shut-off valve (1), until the DIS tester indicates the presence of pressure. Measure the fuel supply pressure, for which:
- connect the pressure sensor to the DIS tester and start the engine;
- select mode «Measurement system»;
- after the appearance of the function «multimeter», select mode «Pressure test»;
- read the value of the fuel supply pressure and compare the actual value of the test pressure with the set value - 3.5±0.2 bar;
- turn off the engine and analyze the results.
Check the fuel pump, for which:
- remove the fuel pump relay so that the pump does not start from the engine control unit, and install the tool «61.3.050» to contacts «87» And «30» relay pads:
- press the button on the device and read the fuel pump supply pressure on the DIS tester;
- compare the actual value with the set fuel supply value - 3.5±0.2 bar.
Install fixture «13.3.010» (pic. 3.34, see fig.) for subsequent checks.