Warning: Gasoline is extremely explosive - use extreme caution when working around the fuel system.
Always keep a fire extinguisher close to the work site, read the rules for its use before starting work. Protect your eyes with glasses, immediately wash off any fuel spilled on your skin with soap and water. Please note that fuel vapor is as dangerous as liquid fuel and even more so; the container that contained liquid fuel will still contain vapor and is potentially explosive.
Many of the tasks described in this Section require disconnecting the fuel lines, which may result in fuel spillage.
There is always pressure in the fuel system even after some time after the engine has been turned off. Before starting work on the components of the fuel system, this pressure must be released - follow the instructions Chapter 9.
When working with fuel system components, be careful to keep everything clean - dirt that gets into the fuel system can cause blockages.
In the interest of your own safety and the protection of your equipment, it is necessary to disconnect the negative battery cable when performing many of the procedures suggested in this Section. First, this eliminates the possibility of accidental short circuits, and second, it prevents damage to electronic components (for example sensors, actuators, ECU), which are particularly sensitive to voltage surges caused by disconnecting or connecting the wiring harness.
It should be noted that the engine management systems described in this Scatter (and Section 5) - self-learning, this allows the system to adapt to the current operating parameters of the engine, as it wears out during operation. This accumulated information will be lost after disconnecting the battery, and after that the system will need some time to relearn the characteristics of the engine - this may manifest itself (temporarily) as rough idle, reduced throttle response and possibly a slight increase in fuel consumption until the system re-adapts to the current conditions. The adaptation time depends on the frequency of use of the car and the driving conditions.