Vehicle & Technical > Discovery

Any Ideas, trouble filling up with LPG

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stevepage3:
Hi

I have recently aquired a 3.9v8 Disco which has 2x 35 litre LPG tanks under the sills.

My problem I have run the car until the LPG system says it has no gas and switches back to LPG but when I try and fill up it will only let me put 28 litres in which I assume is only one tank.

Any ideas.

Steve

jimthelandyman:
You will never be able to fill the tanks right to the top, i'm assuming that this is to allow the gas to expand in the tank? I think its some safety thing anyway. My 80 litre tank will only hold 64 litres.

barnhill4x4:
Are the solenoids working on both tanks? Sounds like one isn't opening.

stevepage3:
Sorry guys

but this is first Lpg car I have had, I understand that if I have 2 35 litre tanks that would give me 70 litres and I would only be able to fill to about 60 litres.

The problem I am having is I can only fill 28 litres which I assume is 1 tank full of the 2 and the second one will not let me fill it. Solenoids ? what are they where are they ?.

Any other ideas or info on how this works..

Steve

Range Rover Blues:
It depends how your system is fitted but as I understand it you can only have 1 tank "open" at any one time, so that if you have an accident and roll the liquid phase can't run out of one tank into another.  As stated there must always be about 20% "ullage" above the liquid phase (the LPG that has condensed due to the pressure).

Now 28 litres sounds about right for one 33 litre tank.

So, either you aren't getting all your tanks connected, or the valves in 2 of them are stuck somehow.  As a guide the tank that is emptying might feel colder than the other 2 :-k

It's also possible that you have a blocked filter and the LPG system switches back to petrol way too early because it thinks you are out of gas.  My multipoint system monitors the LPG pressure in the injector rail and if it falls too low then it cuts back to petrol.  It does it a lot when I get over-enthusiastic :oops:

Could be ready for a good service.

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