The fuel supply system includes: a fuel tank with a gasoline pump, a pressure regulator, a fuel filter, a nozzle rail, drain and supply lines. Through special pipelines, the gas tank communicates with the atmosphere. This eliminates deformation. But there are situations when the pressure in the fuel rail is violated, which leads to a malfunction of the fuel system. To prevent this, it is necessary to periodically check the pressure in the rail.
Instructions
Step 1
Check the pressure with a conventional pressure gauge. To do this, disconnect the wire from the negative terminal of the battery. Slide the oil-resistant hose onto the pressure gauge connection. The inner diameter of the hose is 12 mm, do not forget to secure it with a hose clamp.
Step 2
Be sure to relieve pressure before starting work. To do this, brake the car and engage in neutral. Remove the hatch cover above the fuel tank by unscrewing the fastening screws. Disconnect the fuel pump connector from the wiring harness.
Step 3
Start the engine, it should stall when the gasoline in the fuel line runs out. Switch on the starter for a few seconds. Unscrew the plastic cap from the fuel line fitting. Unscrew the spool from the fuel rail union and install the pressure gauge hose there.
Step 4
Start the engine at idle speed. Check the fuel pressure, which ideally should be about 3 atmospheres. Then remove the vacuum hose that is installed on the fuel pressure regulator. Measure the pressure again. If the regulator is working properly, then it will grow by 0, 2-0, 7 atmospheres.
Step 5
If the pressure is below normal, then there may be several "culprits". Gain revs and measure the pressure again. If it increases with increasing speed, then it is time to change the fuel filter. And if at the same time the pressure drops, then the pump needs to be replaced.
