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Thread: LPG operation

  1. #1
    Regular Member rich r's Avatar
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    Default LPG operation

    I'm enjoying my 2004 Elegance 1.8 Dual Fuel - but as I got very little in the way of manuals with the car, I'd just like to ask if anyone can tell me a little about the LPG system. My last car used a BRC LPG system, so I know LPG very well - it's just the operation of the system Vauxhall use that puzzles me a bit.

    Firstly, is there any way of telling if it's actually running on LPG or running on petrol? On my BRC system a light changed colour when it was up to temperature and switched over, for example. I can tell the fuel gauge changes over and the economy drops a little when the switch is in the LPG position, so I'm confident it is actually running on LPG.

    Secondly, what does the green light on the switch mean? I've never seen it on, other than flashing sometimes before I start the engine. Is it a fault indicator?

    I have managed to find a PDF of the Vectra owner's manual, which has been very useful - but there's no mention of the LPG system.

  2. #2
    Regular Member paz_badboy4life's Avatar
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    Vehicle : Vectra SRi Dual Fuel NAV

    Trim : PreFace SRi

    Engine : 1.8 LPG

    Year : 53

    Default

    i have a 2004 53 plate 1.8 Sri Nav Dualfuel. any questions and i will be more than happy to help. i've owned mine over a year, and my cousin has one too.

    when u first start the car the green flashing light indicates that it is running on petrol, after a while when it warms up the light will stop, this means you are running on gas. in the summer it doesnt take long, in winter takes ages, but there is no problem in driving it when it is flashing.

    when u eventually run out of gas, the light will flash rapidly, at this point flick the switch and then u will be running in petrol mode.

    when u run out of gas the car will just continue to run on petrol automatically.

    u will have to make sure that there is a little bit of petrol in the car at all times as this is needed to start the car initiallly.

    you can comfortly change between gas or petrol whilst driving by just flicking the switch. the switch should be near your ashtray.

    if u look at your gas tank in your boot, u will notice it is a 55litre tank. but the most u will be able to fill ever is around 40 litres, this is normal and just a safety measure as gas expands with temperature. i have been known to fill around 50 litres, this is because there is a ball bearing valve and sometimes it jams and doesnt drop/close and allows u to overfill. if you see it approaching 50 litres i would stop.

    i hope this helps. if u want any more info just ask pal.

    PaZ!

  3. #3
    Regular Member rich r's Avatar
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    Default

    Thanks Paz, that bears out what I thought. The operation (starting on petrol until warm, and automatically switching back when out of gas) is the same as my previous car.

    I did pay attention to the light this morning and yes - it flashed for the first minute or so then went out. I guess I just haven't paid enough attention to it so far (only had the car since Saturday).

    Many thanks.

    Rich

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    hi all
    i bought a 1.8 2006 club dualfuel back in september.
    the prices vary around where i live, its at 79p locally and if i travell about 20miles its only 67p. i find that in winter i can get more in the tank costing about £34.00 at 79p.
    i have extra weight with a tow bar fitted that i dont use, i would like it removed but am worried about having someone bang the rear end with the lpg tank there,or are they pretty safe?

    thanks

  5. #5
    Regular Member rich r's Avatar
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    Default

    Safer than petrol tanks. They're quite thick metal. and the tank shape (like a doughnut) is incredibly strong because of the curved surface, making it extremely difficult to crush or deform.

    There are safety valves that seal off the pipes connections if they're detached too.

  6. #6
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    Saw a photo of one that had been rear ended - whole back of the car folded around the tank but tank itself was fine

    Quote Originally Posted by adamuk14 View Post
    hi all
    i bought a 1.8 2006 club dualfuel back in september.
    the prices vary around where i live, its at 79p locally and if i travell about 20miles its only 67p. i find that in winter i can get more in the tank costing about £34.00 at 79p.
    i have extra weight with a tow bar fitted that i dont use, i would like it removed but am worried about having someone bang the rear end with the lpg tank there,or are they pretty safe?

    thanks

  7. #7
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    They're designed to withstand more G forces than a fighter aircraft. Saw a video of a lpg car on fire, they are designed to give a controlled burn (fusible plugs I think) so the tank does not explode.

  8. #8
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    Default

    cool, think the towbars coming off now, lol

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