92 GQ on dual fuel... fuel tank somehow keeps increasing capacity?????

[taslucas]

Its not the fuel gauge is faulty but im not going by fuel gauge im going from the litres on the bowser when fill it up.
Cant see the fuel tank theres a plate over it

How do you know when to fill up? The gauge might be saying empty when it's not empty. My gauge is dodgy and only sits at about 1/3 when the tank is full. If I drive until the gauge goes to empty I have only used about half a tank so if I fill up at that time only 35 ish litres will fit in.

>>>tappin from tassie

[mudnut]

I'm with Lucas on this one, as the gauge seems to be fluctuating. Since you have dual fuel you need to run the tank dry then fill it up.

[Reecey86]

Blocked line or dodgy fill line may be possible!
I highly doubt numerous bowsers would be faulty.
As i said i had the issue previously where i had put just over 40litres but it was pouring out underneath - this time its not spilled anything. I dont know if its possible but perhaps theres alot of sedement in the tank that has hardened. Dont know how long the car sat for before we bought it or what its history was prior to that person.

The fuel gauge is faulty however we do not use it to gauge how much fuel we have and it unfortunately cannot tell me how many litres have gone in to it so the fuel fauge is not part the problem.

Tell ya what though.. this car certainly has a few quirks!!

[Reecey86]

How do you know when to fill up? The gauge might be saying empty when it's not empty. My gauge is dodgy and only sits at about 1/3 when the tank is full. If I drive until the gauge goes to empty I have only used about half a tank so if I fill up at that time only 35 ish litres will fit in.

>>>tappin from tassie

We have reset the trip and run it empty a number of times to see gow many kms we get on petrol alone. When its getting close to 200kms we fill up or when you feel it starting to run out lol

[Reecey86]

I'm with Lucas on this one, as the gauge seems to be fluctuating. Since you have dual fuel you need to run the tank dry then fill it up.

We have done that a few times 😕

[taslucas]

Hmm that's interesting. Have you looked under to see what tank you have? As said above, it was common to fit a larger fuel tank along the chassis in the middle of the vehicle when they were converted to dual fuel. You should be able to get a rough guess of the volume

>>>tappin from tassie

[dom14]

We get about 200kms to 30litres.

Just not understanding how weve gone from 30 litres to 40 odd but spilling out from somewhere and nw 50litres and not spilling a drop lol

That is exceptionally good fuel economy(petrol?), assuming the figures are correct.

[dom14]

Blocked line or dodgy fill line may be possible!
I highly doubt numerous bowsers would be faulty.
As i said i had the issue previously where i had put just over 40litres but it was pouring out underneath - this time its not spilled anything. I dont know if its possible but perhaps theres alot of sedement in the tank that has hardened. Dont know how long the car sat for before we bought it or what its history was prior to that person.

The fuel gauge is faulty however we do not use it to gauge how much fuel we have and it unfortunately cannot tell me how many litres have gone in to it so the fuel fauge is not part the problem.

Tell ya what though.. this car certainly has a few quirks!!

After market long range 70 litre petrol tanks still use the original fuel pump/sender unit, but does not yield accurate reading unless you
fiddle with the sender stick by bending it and testing the fuel gauge, until or if you get it right. So the gauge can't be accurate unless it's an aftermarket accurate gauge.

Since you're saying it spilled some petrol, I think you're looking at lowering the tank and find out where it's leaking from and fix it asap.
It's not a good idea to drive a vehicle with a leaky tank.

[taslucas]

On a side note: When my Tb42s auto was still dual fuel, not tuned very well and me driving hard (very heavy foot lol) on country roads, I was using up to 35 litres per 100 kms. I noticed a massive difference when I converted to petrol only and fitted new plugs (petrol suited) and electronic ignition and tuned the carby. it is possible to run dual fuel a lot more efficiently than I was, as others here will agree, but I decided on straight petrol.

>>>tappin from tassie

[dom14]

On a side note: When my Tb42s auto was still dual fuel, not tuned very well and me driving hard (very heavy foot lol) on country roads, I was using up to 35 litres per 100 kms. I noticed a massive difference when I converted to petrol only and fitted new plugs (petrol suited) and electronic ignition and tuned the carby. it is possible to run dual fuel a lot more efficiently than I was, as others here will agree, but I decided on straight petrol.

>>>tappin from tassie

It's a personal choice at the end of the day. I prefer the options of dual fuel 'cos LPG generally cuts the half of the fuel cost and when setup and tuned properly, LPG can be better for the engine. LPG isn't that great for outback traveling, so it all comes down to where you go. Your LPG economy of 100km/35L is pretty bad. LPG system was obviously in need of a tune, alone with the carby. LPG works better when you use it with a dedicated LPG mixer/carby rather than a petrol carby. I setup a three tank LPG system to boost the LPG capacity to around 250 litres. That kinda helps with long outback treks with little or no access to LPG.
Diesel is the best choice when you can afford it.