Hmm NOT GOOD aussietraveller,, I have been a Duel Fuel guy since the 1980's Where abouts in N.T. did this happen, ?? I was all around Ayes Rock, Kings Canyon, and surrounds 3 years ago, and had No problems with any of the Lpg, [ did not like the price at times, ] But the car i had then [ Mazda Tribute + 16' poptop ] ran like a dream, no problems at all,, I now have a 2011 Colorado fact/fitted duel fuel and a 19'6'' Lotus full van ] and next year I will be travelling further up into the N.T. so your story is of some interest and concern to me ??

I see you have a Pajero, which if fitted with the LPG approved engine are a good tow vehicle, is your Gas system Direct Injected ?? or is it the Old style Venturi system,?? As the venturi systems were famous for blowing the boxes, and also blowing off some of the hoses ?/ especially if they were not kept well tuned, and fitted with the High Temp Leads ??

I will follow any information you get with interest, ? as I said i am going back up there next year,, Good luck with your outcome..    

I have had a Diesel/Gas system fitted to our HDJ79 Ute for 8 years and just recently travelled from SA to Tennant Ck

and filled up with Gas twice before turning east to Qld without any problems or performance issues. All around Aust the mix percentages of 

Butane with the Propane varies with States, Localities, Seasons (ie Temps because if 100% Butane, vehicles would not operate below -0.5 degrees

the Liquid Gas will not Boil Off so Autogas always has a mix of Propane in it).

 I would find it hard to believe that the Gas suppliers would supply a 100% Propane mix for vehicles as "This would cause major problems"

as the Butane has a Higher Calorific Heat Value and as such is used and always needed to raise the Octane rating of the Autogas.

 Autogas is always a mix of these two gases and not just one or the other. 

Cheers Kev.

Australia is one of the largest producers of LPG - We export over 3.5 Bil / Lt per year?
So why do we pay the high prices here in Oz -
its not transport and using LPG is almost carbon free. so much for the carbon tax..

In Thailand recently they pay less than 50cAUS p/ltr AutoLPG? yep cheap eh...
Why the high price in Oz -
Purely because they can get away with it and no one says anything..
including the Governement.

Here is a Note Shell web site on LPG - Quote:-

"Automotive LPG, automix or autogas refers to the LPG used for automotive applications.
Automotive LPG consists of a mix of propane and butane, whereas domestic, industrial and commercial LPG is predominantly propane.

Generally, the autogas sold by Shell is a mixture of propane (C3 or 3 carbon atoms) and butane (C4 or 4 carbon atoms).

Depending on the source of the auto LPG and how it has been produced, other components may also be present.
To ensure that the auto LPG you receive is of a consistent high quality, detailed specifications are laid down.
Every batch of auto LPG is rigorously tested to ensure that it always meets the appropriate specification."

The last sentence I dont really believe ...

After being overseas recently - Australia definately is one of the dearest places to live
But - its still the best... by far..

Norm

KT

I think you have hit the nail on the head..

Country GAS is ALL Propane...

Back when I had the XF Panel Van I paid a nice amount of $$ to have a custom built Pure Gas Motor built.. 3/4 Race Cam Oversize Valve etc.. I think you get the idea..
- The Motor on the Dyno after it was run it put out 60% more power than the original spec's on the current petrol Motor.. Was Running a GAS RESEARCH system back then..

It would Cruse at over 140k's Comfortable.. and if you gave it the Boot it would pickup quickly.. Sucked fuel[> 110l'ks ] like it was going out of fashion But it had the power..
- It ran on Pure Propane beautiful and had to be down graded to run on LPG..

Before the price of gas started to rise over $0.25c / Lt the general mix of the gas was higher in Propane than what we have now.. and a Few Spot's sold Propane for 1c more..

Now the LPG is very Suspect except when you get out of the major city's..

Juergen..

Psst make sure that you clean up the Filter on a regular basis as they do fill up with a lovely Black gunk..

I need to correct the information that I initially posted as I have after doing the rounds of several mechanical workshops in Darwin now found out what the real problem is,

Prior to leaving home I had a workshop do a number of things to ensure that I didn't have problems on the road this included new Platinum Plugs new high tension leads and new seals ib the spark plug tubes,

An experienced mechanic who did a lot of LPG conversions up here found that there was oil in the spark plug tube which means that it was shorting out and causing the back fire so either one or more seals have failed or the job was not done properly, tug still drivable on petrol as requires not as strong a spark so it will be petrol only going home as to get the job done was going to cost $800 approx and couldn't be done for three weeks.

LPG IN THE NORTHERN TERRITORY IS NOT THE PROBLEM

 Thanks for clearing up the situation, I will rest a little easier . when i am there next year,,