1. Relieve the pressure in the supply system (see. Section Dropping the pressure in the supply).  | 2. Disconnect the outlet line from the fuel filter is connected between the filter and the fuel line fitting a three-way, which is connected to a pressure gauge. Track reliability of a tightening hose clamps. |
3. Turn off all electrical consumers and turn the key in the ignition switch to ON. It must happen 5-second switch of the fuel pump, - the pressure gauge reading. Compare result to requirements of Specifications.
4. Start the engine and warm it up at idle until normal operating temperature. Read the pressure gauge reading and compare it to the value specified in the Specifications. Disconnect the pressure regulator vacuum line (see. Section Removal and installation of the fuel pressure regulator), - the pressure must be increased to the value specified in paragraph 4.
5. If the readings taken are within the limits specified in Specifications range, therefore, the system is functioning properly, otherwise, check the following:
a) If the pressure is too high, check the vacuum supply to the fuel pressure regulator. Changing engine speed should lead to fluctuations in the vacuum. If depression occurs, check the patency and condition of the hose and pipe fuel return line. If the return line is OK, replace the pressure regulator;
b) In extremely low pressure, check the condition and patency of the fuel filter and the fuel pipe extending from the fuel line to the fuel tank. If no violations during the inspection can not be identified, start the engine and slowly press a return line. If the pressure increase of more than 3.0 kgf / cm 2, replace the pressure regulator (see. Section Removal and installation of the fuel pressure regulator). 6. Stop the engine, leaving the ignition on. Keep watching the pressure gauge for about another 5 minutes - the pressure must be reduced slowly. If the pressure drops too quickly, check the following:
a) Do not turn off the ignition, press a fuel supply line in the area between the three-way fitting and the fuel tank, then turn off the ignition, - if the pressure falls rapidly, so there are leaks through the injector (s) injection;
b) Re-turn on the ignition and press a feed line, this time, the area between the nipple and the fuel line. Turn the ignition off, - a rapid drop in pressure indicates a violation of the functioning of the control valve of the fuel pump submerged.
7. When you have finished testing, release pressure fuel (see. Section Dropping the pressure in the fuel system), and disconnect the pressure gauge. |
