Before diagnosing the injection system, the following conditions must be met: There are no errors in the engine control during start-up. When starting both a cold and a warm engine, it is necessary to lightly press the gas pedal. There must be fuel in the tank, the engine must be mechanically sound, the valve clearances are adjusted, the battery is charged, the starter speed is sufficient to start the engine, the ignition system is good, the fuel system must be tight and free of contaminants, the crankcase ventilation must be in good order, electrical connections weight should be ok.
Attention: Before opening the fuel hoses and pipelines, their connections must first be cleaned with gasoline.