Does a fuel pump run continuously while the ignition is on?
Hi,
I'd like to try changing the diesel filter on my vehicle myself. I think I can do it.
I want to do it according to a repair manual. It says that you can bleed it using a diagnostic system. Alternatively, you can do it by turning the ignition on and off several times.
I'd be interested to know where the air goes then. Doesn't it push it further in?
And wouldn't it make sense to fill the filter with diesel beforehand?
Thank you in advance
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When the ignition is switched on, a fuel prefeed pump always only runs a few seconds. The engine control receives a signal that the motor rotates, the pump is activated again.
Nevertheless, it is advisable to fill the new filter in advance. Some diesels are hard to complain until the air is out of the system.
Denying gas, joking, starting multiple times… are just a few of the symptoms that can occur.
And until the whole air gets out, it can be necessary to start the ignition 10-20 times.
You are better served if you are looking for the relay for the sprite pump in the fuse box. Many have a base on which you can put a flat fuse. It’s the relay. Just don’t forget to pull the fuse back off the relay!
Thanks for the good tip!!!
The fuel is running in circles.
It is advanced, through the diesel filter to the engine.
The engine takes what he needs, the rest goes back to the tank.
Has several advantages: 1. The complete Sprit is pressed and cleaned by the filter. Permanent.
and 2.th: the fuel is strongly heated by the high-pressure pump. By pumping back into the tank, it cools off again. (Kalter Sprit increases engine performance)
Ahja very good. That means the air goes into the tank and volatilizes
Thus, the air goes into the day and, if necessary, is discharged via the fuel vent in a controlled manner. Every tank has such a system. Otherwise you would always have over or underpressure in the tank. And you don’t want to.
A tank releases gases when, for example, it is very warm and the fuel expands.
However, it also lets air in when, for example, a lot of fuel is consumed, so that it does not produce a negative pressure.
And this circulation is always in progress when the ignition is switched on? Even if the engine doesn’t run?
the fuel passes through the filter, direction one sprinkling system. shortly before, it goes back to the tank through a return line.
the fuel pump typically runs a small moment when the ignition is switched on. then it goes back to the motor start.
what’s in the lead is already the right way if you don’t have a diagnostic tool.
Lg, Anna