Remember that gasoline is a highly flammable liquid! When working with fuel system components, observe all accepted fire safety measures. Do not smoke! Do not approach the work site with an open flame or an unprotected portable lamp! Do not service the system in rooms equipped with heating devices operating on natural gas and equipped with a pilot torch (such as water heaters and clothes dryers). Do not forget that gasoline is a carcinogen, i.e., a substance that promotes the development of cancer! Try to avoid fuel coming into contact with exposed areas of the body - use rubber protective gloves, in case of accidental unexpected contact with fuel, wash your hands thoroughly with warm water and soap. Immediately collect spilled fuel and do not store fuel-soaked rags near open flames. Remember that the fuel system of models equipped with fuel injection is constantly under pressure. Before disconnecting the fuel lines, release the residual pressure in the system. When servicing fuel system components, wear protective glasses. Always keep a class B fire extinguisher at hand!
As mentioned above (see section Fuel, exhaust and emission control systems), the fuel system includes an electric fuel pump placed inside the tank, a submersible fuel filter, injection injectors, a pressure regulator and fuel lines connecting the listed components. The fuel inside the fuel system tract is under pressure when the engine is running and the ignition is on. Residual excess pressure continues to be retained in the system for some time after the ignition is turned off and must be released before disconnecting components/disconnecting nipple connectors.
The fuel system must be depressurized before servicing any of its components to minimize the risk of fuel ignition and personal injury to the operator.
1. On x12SZ, C14SZ and X14NZ engines disconnect the wiring harness of the fuel pump relay (arrow) located in the footwell, behind the right A-pillar cover, and run the engine for 5 s to relieve the fuel pressure.
Fuel pump relay
2. On x14SE, X14XE, X16XE, C16XE engines and 1.0 and 1.2 L DOHC engines remove the fuel pump fuse (No. 26 in the fuse box), start the engine and let it run until it stalls on its own, then turn the engine with the starter 2÷3 turns.
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