- A) incorrect actions when starting the engine are excluded. Do not press the accelerator pedal when the engine is cold or warm. After starting a warm engine, it may take a little «rev up»;
- b) the tank must be filled with fuel, the engine has no mechanical damage, the battery is charged, the starter rotates with a sufficient number of revolutions, the ignition system is in good condition and adjusted, the fuel system is sealed, there are no impurities in the fuel supply system, crankcase ventilation is in order, electrical wire «masses» (-) (engine - gearbox - body) connected. Interrogate the self-diagnosis system in the workshop and print out possible fault codes.
Attention! The fuel system is under pressure. If it is necessary to disconnect the fuel lines, place a rag over the joint and clean the joints with a cold cleaner.
Engine won't start
The fuel pump does not work when the starter is turned on (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 fuel injectors
Check power supply.
A cold engine does not start well. Runs uneven
Faulty coolant temperature sensor or intake air temperature sensor
Check sensors.
Engine stalls
Breakage of fuel pump power wires
Check the fuel pump plug connections as well as the relay. Check fuse and contacts. Clean or replace them.
Clogged fuel filter
Replace fuel filter.
Faulty fuel pump
Check fuel pump.
Faulty valve injector
Check valve injectors.
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 rises dangerously, repair the leak.
Attention! Gasoline vapors are poisonous. Do not inhale!
Faulty temperature sensor
Check the coolant temperature sensor or intake air temperature sensor.
Leaky fuel system
Check visually all connections on the engine and electric fuel pump. Tighten all threaded connections.
Hot engine won't start
Too high pressure in the fuel system
Check the pressure, replace the pressure reducing valve if necessary.