just for in case, I write the symptoms down once more. Maybe someone has any ideas, what would cause that
* turn the ignition ON, pump starts priming but stops with a click in 0,5-1 second. Normal prime takes about 2+ seconds. I can clearly hear the difference.
It seems like something is telling the pump to stop.
in case of this short prime, the engine wont start. Cranks good, but wont even try to start.
in case of the normal/long prime, the car starts good, and drives, with no symptoms or issues.
usually it wont prime correct and wont start if the weather is colder. Usually in the morning is the worst.
no check engine light, or any other lights in the dash.
because the issue is only with getting the car started, but not with driving, I would think that the isssue is not the fuel pump. I would guess, that its some sensor or the ecu that does not let the car start for some reason. But what sensor would stop the fuel pump mid-priming, when the ignition is turned on?