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Weird - fuel gauge and air con problem

Posted: Wed Jun 02, 2010 7:01 pm
by BongoDon
Hi Folks,
Had something very weird happen on the way home from work today.

I work in Bedford, about 11 miles away. Fuel gauge shows just over a quarter full. Because the van is hot when I get into it, I stick the air con on three 'bars', and put the rear part on. Bit of a palaver getting out of Bedford (traffic lights and queues), but eventually get out onto the open road. Driven about 7 or 8 miles, and look down to see an empty fuel tank. Crikes! Looking in the rear view mirror I cant see a line of liquid behind me, though the view isnt great (I really should clean that back window!).
Van isnt showing any signs of stalling/going wrong, so I try to carry on, gliding where possible, trying to reach the petrol station that is only 600/700 yards from where I live. Suddenly realise that the air-con may be increasing the fuel consumption, so quickly turn it all off.

Within 500 yards of doing that, the needle starts creeping back up towards where it started. :?


Has anyone else experienced this? Nothing bad has happened, but it could be a sign of something about to go. :-k

Re: Weird - fuel gauge and air con problem

Posted: Wed Jun 02, 2010 8:14 pm
by g8dhe
It sounds very much like the very common earthing problem on the fuel tank sender, the link with the Air-con is probably down to stray earth currents for the fans etc, especially if you had the rear fan/air-con on.
There is a factsheet here on the problem with the fuel sender http://www.igmaynard.co.uk/bongo/member ... sender.pdf

Re: Weird - fuel gauge and air con problem

Posted: Wed Jun 02, 2010 8:53 pm
by BongoDon
Phew! Thanks Geoff.

Being a technical numptie, can I ask if it is important to fix quite quickly? Or is it one of those things to get around to eventually?

Re: Weird - fuel gauge and air con problem

Posted: Wed Jun 02, 2010 8:58 pm
by g8dhe
Depends on how much you like your gauge to work :!:
You might start cursing and swearing when the gauge REALLY reads zero ( well usually, minus quite a bit) and your thinking I'll still get a round tuit.

Re: Weird - fuel gauge and air con problem

Posted: Wed Jun 02, 2010 9:37 pm
by BongoDon
Cheers! :D

So I can fill her up, which gives me about a fortnight to fix it, then.