If the vehicle is operated in very dusty conditions or with low-quality fuel, the filter must be replaced more often than specified in the regulations. We carry out the work on an inspection ditch or overpass.
The fuel filter is installed underneath the vehicle in a recess in the bottom above the additional muffler of the exhaust system.
Fuel in the power supply system (with the ignition on and for some time after it is turned off) is under pressure. Therefore, if we replace the filter immediately after a trip or after turning on the ignition, it is necessary to relieve the fuel pressure in the fuel system. If the ignition has not been turned on for a day or more, there is usually no fuel pressure in the system. This can be checked by unscrewing the fuel rail nipple cap and pressing on the valve stem (see "Power supply system").
When replacing the filter, it is necessary to take into account that it is located below the fuel tank and when the filter is removed, fuel can flow out of the tank by gravity through the disconnected tube. Therefore, we place a container under the filter to collect the fuel.
To relieve pressure in the system, remove the trim of the left front side panel (see "Removal the controller").
By pressing on two clamps, we disconnect the connector block of the engine management system wiring harness and the rear wiring harness.
We start the engine and let it idle until it stops due to running out of fuel. Then we turn on the starter for 2-3 seconds. After this, the pressure in the fuel system will be released.
Using a 10 mm spanner, loosen the bolt securing the fuel filter clamp.
Holding the fuel filter housing by the hexagon with a 19 mm wrench, use a 17 mm wrench to unscrew the fitting of the fuel supply pipe to the filter.
We remove the tip of the tube from the filter and, to prevent fuel leakage from the tank, we put the cap of the brake bleed nipple on the tip.
Similarly, we unscrew the fitting of the fuel supply pipe tip to the rail...
...and we remove the tip of the tube from the filter.
We move the filter forward and remove it from the clamp.
We drain the remaining fuel from the filter into a container.
We install the new filter in the reverse order.
The arrow on the filter housing must be oriented in the direction of fuel flow (to the front of the car).
Before connecting the fuel pipes to the filter, check the condition...
...sealing rubber rings located on the ends of the tubes.
If the ring is damaged (breaks, cracks, dents) or if it loses its elastic properties, we replace the ring. After installing the filter, connect the connector block of the engine management system wiring harness and the rear wiring harness. We turn on the ignition and check the tightness of the connections.