Galaxy 1.9 Tdi Fuel Filter Pressurisng Help

[ianskill]

Hi,been having problems since using veg oil mixed with diesel. cut story short,i stopped using it,changed fuel filter and topped up fresh diesel. Whats happening is,when i fill the fuel filter and reconnect everything,the car will run for a half mile or so then cut out. I have to keep turning ignition on/off to get car started for few seconds then cuts out again.   I noticed when i release the drain plug on filter,there is air in there,when car running,and no fuel coming out.  I have removed the check/return valve and noticed i can blow in both directions of the valve. Isnt it meant be one way clear?    any way or temperary fix till i get new one if this is the problem? thanks

[BrianH]

Doubtful its pressurising, more likely its sucking in air from somewhere.

 

Either its a defective filter (can happen) or you haven't got it installed correctly - are you sure you have the hoses the right way round to start with?
I think from what others have said that the galaxy diesels do have a pump in the tank - It will make a bit of a mess doing so but disconnecting the inlet should allow you to release some fuel by turning the key (if you can get something over the end of the hose to catch the diesel if any comes out this will minimise the mess created). This will allow you to check the hose you think is the one from the tank really is the one from the tank!

 

There is a place they can break - the hose joint itself - does it move once installed, if so its probably broken, it should almost latch onto the pipe that sticks out of the filter. I don't know on the check valve if it is a one way valve or not.

Edited December 16, 2016 by BrianH

[ianskill]

hi,seems strange all this has happened since putting vegetable oil in. Ive used it for years without any problem.  Anyway,i got the new return valve today and problem persists. The pipes are 100 percent right way round. The fuel filter is a new one. Ive disconnected the feed and i get no fuel on ignition or crank. I can hear the pump in tank also.   Whats happening is when the car cuts out after 20 secs or so i have have to keep turning ignition on/off to try get fuel through,last attempt car ran for 10 seconds,   here is picture of filter and pipes,feed being top right.   Is it possible the fuel contaminated or has water in it?  looks ok when i inspect it

[BrianH]

I'd have thought more likely the pickup is blocked up - if it was full of water this should fill the filter up not leave it empty. Do you get a good flow of fuel through if you disconnect the feed at the filter and catch what comes out, or is it more like a splutter or dribble? if so then it sounds likes whats happening is the high pressure pump is sucking the filter dry faster than its able to be filled back up.

 

Was this new or used veg oil? If its used is there any chance you've got something into the tank that shouldn't be there? Either debris or a bit of the seal off the bottles? Or the top seal off a bottle of redex or similar? Its been known before that the metal seal can end up in the tank by mistake and keep causing pickup issues.

 

The only thing that could happen with water in the fuel is it could freeze in the tank, you'd have to have quite a lot to notice it causing an issue though, and you'd probably notice the difference in the fuel if it was.

Edited December 19, 2016 by BrianH

[ianskill]

 

Just an update to help anyone. I got my new check valve today and still the same. I pulled off the feed to the filter and ignition on. i get humming from the lift pump in tank but no fuel coming out. Its like i have a blockage somewhere. 

p.s another update, ive had the tank pump out for brief inspection and blown down any fuel pipes. ive connected back up and now i have fuel coming to filter, ill update on when battery fully charged to see outcome.  Its looking like i may have had blockage around tank pump or line somewhere,fingers crossed and thanks for help brian

Edited December 19, 2016 by ianskill

[BrianH]

 

 

Just an update to help anyone. I got my new check valve today and still the same. I pulled off the feed to the filter and ignition on. i get humming from the lift pump in tank but no fuel coming out. Its like i have a blockage somewhere. 

 

p.s another update, ive had the tank pump out for brief inspection and blown down any fuel pipes. ive connected back up and now i have fuel coming to filter, ill update on when battery fully charged to see outcome.  Its looking like i may have had blockage around tank pump or line somewhere,fingers crossed and thanks for help brian

 

 

You might be lucky and find thats the end of it - depends what blocked it in the first place and if it gets picked back up. If it does it again don't blow down the pipe and remove the pump - if your lucky it might still be stuck to the bottom of the pipe. My mates landrover regularly did this when the strainer fell off, allowing the pipe to fill up with what looked like soil and sand!. though in his case its partly the tank (metal) rotting away from the inside causing debris in the fuel. Fixed the strainer with a fuel hose clamp and its been ok since.

 

cheers for feeding back the cause though - good to know when somethings worked!

Edited December 19, 2016 by BrianH