Engine won't start
The fuel pump does not work when the starter is running (can't hear his noise)
Check the voltage supply to the fuel pump. Check contacts.
Defective fuel pump fuse
Check fuse.
Faulty fuel pump relay
Check the relay.
No power to valve injectors
Disconnect the valve injector plug. Connect the tester with a control diode bulb to the power wires of the valve injectors and press the starter. The control lamp should flash.
A cold engine does not start well. Runs uneven
Faulty coolant temperature sensor or intake air temperature sensor
Check sensors.
The engine is unstable in transient conditions
Leaky air intake system
Check the air intake system. To do this, leave the engine to idle and lubricate the joints and seals of the intake tract with gasoline. If the speed increases, repair the leak.
Attention! Gasoline vapors are poisonous. Do not inhale!
Leaky fuel system
Check visually all connections near the engine and electric fuel pump. Tighten all threaded connections.
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