ATTENTION! An engine with a fuel injection system with a neutralizer and oxygen sensor operates properly if only unleaded gasoline is used. Leaded gasoline quickly disables these components, smoky exhaust appears, fuel consumption increases sharply and vehicle dynamics deteriorate.
The neutralizer is an expensive component that protects the environment. The neutralizer can also fail if there is a misfire in the ignition system, since in this case the fuel will ignite in the neutralizer and the temperature in it will increase sharply, which will cause cracks in the ceramic block. Most electronic engine control units have a function to protect neutralizers from misfires. In this case, in one or two cylinders in which misfires are detected, the fuel supply is turned off, and the "Check Engine" lamp turns on in a flashing mode. When misfires occur (engine misfires and jerking when driving) you need to stop driving, turn off the engine and take measures to eliminate the misfires.
To avoid damage to the neutralizer, do not start the engine by towing the vehicle and under no circumstances use the starter to move the vehicle.
Warning! Due to the fact that the catalytic converter located under the bottom of the car has a high temperature, make sure that when parking the car there is no dry grass or other flammable material under the catalytic converter (rags, wood shavings, etc.).
ATTENTION! In the variant version, the car is equipped with a receiving pipe with a catalytic converter, which has a high operating temperature, therefore it is strictly forbidden to place and store flammable materials and objects in the engine compartment (rags, paper, etc.) to prevent possible fire.
On a vehicle with a fuel injection system, the engine management system controller has a function for turning on the electric fuel pump for 2 seconds when the ignition is turned on. On vehicles with MP7.0 controllers, after removing and connecting the battery terminal, the electric fuel pump starts working only when the starter is turned on. With subsequent engine starts, the built-in function of turning on the electric fuel pump when the ignition is turned on is restored. However, after successive three-time ignition on without starting the engine, the next time the electric fuel pump starts working again will only happen when the starter starts working.
[The source is on the website VAZBOOK.ru]
On a vehicle with an MP7.0 controller without an electronic anti-theft system, after removing and then connecting the battery terminal, before the first engine start, it is necessary to wait 5 seconds after turning on the ignition.