530D Fuel Problem

[mxdaz]

hello everybody some kind of help needed

here goes when filling my 530d e60 i can only get a 3rd of a tank in then its full to the top of the filler neck if i leave the car on the drive is slowley runs into the tank very slowley after a hour or so this is causing problems as we are unable to fill the tank completely

nobody as yet has been able to give me any answers thanks hope you can help me

[mickl3008]

Dropping the tank and taking the filler neck off to find the blockage. Sounds like the anti syphon has fell or been broken off and fell down the neck

[Guest Mister Dabsy]

... Or the top breather/vent is corroded or blocked creating an air lock at the top of the tank... Just a thought

[mxdaz]

Cheers going to look in the week

Don't seem to be able to see a metal flap when looking down the neck perhaps this has come off and fell down the neck as suggested

[Guest Mister Dabsy]

Possible I suppose but I'd have thought the filler tube would be slightly wider to accommodate the anti-syphon disc/unit.

[mickl3008]

The filler neck will be tapered. Ive seen this before, although, not on a BMW. If it was air locked I would think it would bubble as it displaces the air

[mxdaz]

The filler neck will be tapered. Ive seen this before, although, not on a BMW. If it was air locked I would think it would bubble as it displaces the air

[mxdaz]

If the necks tapered are you saying the anti syphon could be jammed

[mickl3008]

In my opinion, which isn't worth much, I think it has fell off and stuck further down the neck, restricting the flow of fuel. The only reason i think this, is because i had this problem with a Mondeo. Had to remove the neck, which meant lowering the tank. Should have changed the filler neck, but the customer didn't want to buy a new one. Used a bit of welding wire and forced it back up the neck and removed it. Job done. Ive no idea how BMW route the neck or even where the tank is. Hope this helps

[mxdaz]

Thanks all helps but only seems restricted once I'm at 3rd of a tank

I put 20 litres in last night and it flows in ok if I try more it backs up and flows out

It's strange and annoying but needs sorting as we are off to france in a few week

[mxdaz]

Ok just striped rear wheel arch down to look at filler neck

Breather pipe didn't seem blocked could blow into the tank ???

How does the filler neck come away from the tank does it just pull out ??? Didn't want to damage it and was giving it a good yank

Need the car Dailey so couldn't afford to be off the road any help so I can try again soon cheers

[mxdaz]

Up date !

Took filler neck off not blocked ?

blew into breather doesn't seem

Blocked

But can still only get 3rd of a tank of fuel

Help much needed now please with any more ideas

Fed up

[mickl3008]

If the filler neck is clear, its got to be a breather problem. When you checked the breather, did you blow air down the breather back into the tank. The airflow has to be other way. Blow air into the fuel filler neck and check air is leaving through the breather. There should also be a breather on top of the tank that vents fuel odour away from the car. If those two are clear then its a tank out.

[Estoril X5 D Sport]

This is a guess but I had problems with an E38 years back "twin saddle tank" and the cause of it was the tank purge valve connectors were broken so it wasn't venting correctly, its only a guess but it sounds exactly the same issue as your having Darren.

Regards

Steve

[mxdaz]

If the filler neck is clear, its got to be a breather problem. When you checked the breather, did you blow air down the breather back into the tank. The airflow has to be other way. Blow air into the fuel filler neck and check air is leaving through the breather. There should also be a breather on top of the tank that vents fuel odour away from the car. If those two are clear then its a tank out.

[mxdaz]

Yes I blew into the breather then released it and derv came out The breather Pipe

So presumed that it wasn't blocked if derv flows out or am I wrong thinking that ???

Just cannot understand why it only takes 3rd of a tank and its overflowing at the neck

[mxdaz]

G

[mxdaz]

Feels like only one side of the tank is filling

[Estoril X5 D Sport]

Check the connectors on the purge valve mate its my guess

Steve

[mxdaz]

Check the connectors on the purge valve mate its my guess

Steve

[mxdaz]

Check the connectors on the purge valve mate its my guess

Steve

[mxdaz]

We're abouts will they be on my e60 ??? Are they on the pump or the sender side cheers