300tdi Air in fuel System

Dear All

Thanks for the help in advance

I have been having a hard start in my 300tdi since I bought it When I dont use for a +-3 days (it’s not always hard start but 70% of the time).

I think I have air in the System because I have to use the lift pump , I unbolt the breather bolt in the fuel filter and I have air because I see bubbles and only fuel coming out after a lot of pumping. After the pump the car starts fine.

I have already change the lift pump and the pipe that goes from the fuel sender in the tank to the lift pump. ( I took out the sedimenter).

I think the problem happens more When the fuel tank is low.

Also, my glow plugs dont work However I think it isnt the glow plugs since I have air in the System.

Is there anything I should check? Fuel sender? Return fuel pipe to the tank? Some valve between the fuel filter and the injection pump that I dont know of?

Thanks a lot!

Leak off pipes

julianf said:

Leak off pipes

Click to expand...

Thank you very much for the tip, I Will change and see how it goes!