air getting into petrol tank when filling

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when i fill at the petrol station it clicks every second for some reason, i mean at every service station and the tank isnt full.

I asked a guy about it and he said its something to do with to much air is going into my tank when im filling as i dont have a plug or something.

anyone know what he is on about and how i can fix it.

thanks
 
I dont know if it will help or not but i found that Holding The petrol filling nozzle thing side ways help a lot and it wont click.

Just make sure you pay attention to it if you are going for a full tank because it wont click and will keep going until you get petrol spraying you and running out the tank onto the ground :p
 
Zip said:
I dont know if it will help or not but i found that Holding The petrol filling nozzle thing side ways help a lot and it wont click.

Just make sure you pay attention to it if you are going for a full tank because it wont click and will keep going until you get petrol spraying you and running out the tank onto the ground :p

good effort, thanks.

its just annoying that i seem to spend 20minutes filling the car because it keeps clicking or it delivers slow into my tank and u can hear the bubbling sound.
 
paddyuk said:
good effort, thanks.

its just annoying that i seem to spend 20minutes filling the car because it keeps clicking or it delivers slow into my tank and u can hear the bubbling sound.

The Side ways thing i mentioned should help :)

Does with mine and i used to have the sameish problem
 
mine goes wierd if the nozzle is in the tank as far as possible.

therefore bring it out about an inch. just dont pour it all over the floor
 
The problem is not air getting in, but air getting out. Modern tanks are sealed, i.e. they don't have a breather that goes straight to atmosphere to reduce hydrocarbon emmisions. Instead it is routed to a charcoal canister which is the in turn plumbed into the inlet manifold via a solenoid valve which is under control of the ECU. With the engine turned off, the fuel tank is essentialy sealed so the air has to escape out of the filler, which unfortunately has a pump nozzle mostly blocking it. The trigger mechanism inside the pump nozzle works on backpressure, and the air coming back out of the tank can be enough to trigger it.
 
I used to have this problem at some pumps with my Fiat. I found it only happened at a few filling stations (BP i think), but was OK at others. I just went to the ones that didn't mess me about when filling up.
 
If you look just inside the fuel filler you should see a little thing that looks like a mushroom. That is the expansion breather vent. At the top of the tank is an expansion area for the fuel/air to expand into if it get's warm. If you hold that mushroom thing in (by holding the fuel filler sideways) it forces the valve open and the tank can force the air out through that so it fills better.

You can also fill this volume up with fuel by doing this and get an extra 10-25 litres of fuel in - but don't do it in hot weather or if you're not going to drive the car because you can rupture the fuel lines with an over-pressurised system.
 
Its a bit of a pain but as already mentioned you can tilt the nozzel 90 or 180 degrees, pull the trigger back a bit less so the fuel comes out a little slower or pull the nozzle out a bit.

When I fill up I push the pump in just enough to open the little flap at the top of the filler pipe then keep an eye on it just incase it doesn't cut out.
 
This reminds me of the first time I filled up a car with petrol. I stuck the nozzle too far in and it kept clicking constantly. I was by myself and got scared as I thought it was broken lol, and ended up filling it VERY slowly which took me a good couple of minutes. :p

But yeah, as others have said, rotate the nozzle or pull it out a bit.
 
Another idea for you. Fill up at a BP. They deliver fuel at a maximum rate of 2 drips a minute :( No chance of it cutting out then... probably best to book the afternoon off work though if your filling the tank right up :p
 
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