Стояла два года. Завелась пjdsityyst обороты были. После прогрева не опускались до нормы. Где-то 1000. . Потом вообще перестала заводится. Искра есть. Датчик давления топл сдёргивал не завелась. Ошибок нет. Насос в баке работает. Если открутить гайку с тнвд, бензин хлещет. Течсстрим кажет давление топлива ноль. Прошу совета, что проверить и как?

Что по диагностике говорит?

Hello,

Your basic logic for an engine to run is correct: we need Air, Spark, and Fuel. Since you already confirmed there is a spark, we can skip the ignition system and focus entirely on the fuel system based on your Live Data.

The most critical clue in your post is: "Techstream shows fuel pressure is ZERO". If Techstream can read fuel pressure, this car likely has a Direct Injection (GDI/D-4S) system with a High-Pressure Fuel Pump (HPFP).

Here is my advice on what to check next:

1. Verify the Fuel Pressure Sensor: Is the pressure actually zero, or is the sensor dead? Unplug the sensor on the fuel rail and check for a 5V reference and ground using a multimeter. If the wiring is good, the sensor might be stuck.

2. Old Fuel Issue (2 Years Sitting): Gasoline goes bad and turns into varnish after 2 years. This stale fuel can completely destroy or stick the mechanical High-Pressure Fuel Pump (driven by the camshaft) or stick the injectors wide open.

3. Mechanical Test: You confirmed the low-pressure pump in the tank works. Now, you need to check if the HPFP is generating pressure. If the injectors are stuck open due to bad gas, it will dump all the fuel pressure into the cylinders (check if the spark plugs are wet or if the oil smells like gas).

Clear the old gas, check the HPFP, and monitor the Live Data again. Good luck!