Gq gauges

[taslucas]

Yeah trip meter is a good idea but my driving can be vastly different sometimes. The TB42 will use hardly any fuel cruising gravel roads at 70 k/hr but she chews it when I'm feeling "playful" lol

[Parksy]

I do like to use the trip meter, but there are some days where I don't fill up completely which makes the system useless.

Having a look at fuel gauges on eBay,
It appears they run off specific resistance readings, ie 0-90 ohms. Anyone measures the resistance on the patrol fuel sender from empty to full?

[mudnut]

According to the workshop manual: At full 4.3 ohms. At empty 74.3 -84.8 ohms. I wonder if the gauge is adjustable?

[Parksy]

Might be worth checking, but those figures aren't too far off on one of the gauges I was looking at, might have to investigate further on this. Cheers mudnut!

[Safari Njema]

I agree with Taslucas that it goes a long way below the empty line but I have never had the nerve to allow it to run out completely. I always thought that's an absolute no no with a Diesel engine!

[BigRAWesty]

A pretty fool proof way is to drop the contents of your tank at say 1/8 tank and measure.
This paired with the measuring of the float position will give you the best outcome.

If you want to test the diesel just carry a couple of spanners to crack the fuel line and a jerry can full of juice.. When it conks out top up and prime it.. A bit of a PITA.

My gauge will go a full needle width gap below the e line and still be good.. That was black top though..

[mudnut]

This thread reminds me of a Seinfeld episode, where Kramer goes to a caryard to test drive the same model of car that Seinfeld had bought. He sucked the salesman into driving the car until it ran out, just to see how far the needle went. That way, he could borrow Seinfeld's car and not worry about filling up... I seriously don't want to run out of fuel in front of a log truck, so I will just make sure I fill up before the empty mark.

[liftlid]

A standard tank holds 95 litres, fill your tank when it hits the empty line then you will know how much fuel is left, it will be around 20 litres.

[taslucas]

My problem is I have an aftermarket tank with no idea what size it is. I think the "run it to empty and carry a jerry can" is my only way if knowing

[liftlid]

Oh ok do you know the brand? If you can measure the sides of the tank you could work out the area.