Isuzu MU-X long range fuel tank ,gauge
Submitted: Wednesday, Nov 25, 2015 at 09:12
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brianH
Hi All I have just had a 120 litre long range fuel tank fitted to my vehicle. Prior to fitting the installer told me that until the tank was 50% empty the gauge would show full then after that the gauge would show an approximate reading in regards to the actual contents.
On using 70 litres the gauge shows nearly empty .Before I return to the installer I would like to know if the cure is simply bending the fuel float downwards ( by the installer ) or some thing else .Any info would be greatly appreciated ,thank you ,Brian
Reply By: Bob Y. - Qld - Wednesday, Nov 25, 2015 at 14:25
Wednesday, Nov 25, 2015 at 14:25
Brian,
I've been driving a Hilux dual cab ute lately, that has a 140L tank fitted. It stays on full until it has clocked up over 450kms, and then starts to drop to half and below. From my observations, full to half gives about another 250kms, and about the same from half to empty. For the trip we do, about 720kms, it uses about 100L, which shows about half on the gauge.
Used to have an 80 series fitted with an aftermarket rear tank, and it would do up to 600kms before the gauge would drop off full.
From what I understand, it is as you say, the arm needs to be bent downwards, to get a more accurate reading. Feel it would be very much a trial and error task, and you're unlikely to obtain a highly accurate result. :-(. Think the Longranger website might have a pdf. file that's shows the approximate angles on the float arm, for an "accurate" full reading.
Your current fuel gauge would be a bit disconcerting Brian! Imagine having the needle bouncing on empty, but knowing you still had 30-40L of usable fuel in the tank........no wonder you want it corrected.
Couple of weeks ago, I had a worrying occurrence in the above Hilux. The owner of the ute had fuelled it(or so he thought) and I headed off on the trip(a mail run down the Diamantina River) After about 300 kms or so, the needle had started to creep off full, which had me a bit concerned. Then at the usual point where the needle started to drop, I had just over half a tank left. Touch and go, and some reduced speeds, I got back to town with, he said, 7L left in the tank. Needless to say the ute is fuelled up with more care now. :-)
Bob
AnswerID:
593112
Follow Up By: Member - Wildmax - Wednesday, Nov 25, 2015 at 18:17
Wednesday, Nov 25, 2015 at 18:17
Yep, I've also got a 140 litre long
ranger tank in my Hilux, and get a similar result - shows full until I've done around 300km, and then gradually works down through the gauge. I re-set the trip meter when I fill up and know that I need to leave a bit of room for error once I get towards 1000km (usually get around 14 litres per 100km when towing the trailer).
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