fuel gauge problems!

[geordie white van man]

i have changed the old type dashboard on my G reg transit in favour of the new generation dash but the fuel gauge has gone badly wrong. when the van isnt moving the fuel gauge is reading ok, but if i drive away it goes mental! when i accelerate it goes down and when i slow down it goes up. if the van is standing, running or not its ok so i thought the gauge was faulty. i changed it with a new 1 but is still the same. has anyone ever come accross anything like this before? could it have anything to do with the sender unit being the old type still?

[Boner]

Hi m8
Dont know if this helps but my mk3 has this . not really a problem- think just old parts worn somewhere lol. The van always has more fuel if u either going up hill or the vans tiliting to the right
Myne more when ur moving or if been parked at a funny angle. when moving takes hills or long bends to get the fuel guage really going and only motorways it shows real level.
I learned to live on the rule of £10 does 100 miles in my van
Good luck hae a spare gizzy just incase.

[Gunslinger]

hhhmmm ... sounds like a voltage stabiliser problem to me, like its not leveling the voltage to the fuel guage display, is there anything else on the dash that behaves oddly ? even if its only a little.

the only way to proof this really is to get in there with a meter and check the voltage at the guage, i bet it changes with engine revs

if it is this, to fix it your probably going to have to remove the volatge stabilser from the old dash unit and fit it to the new one (you'll probably find that on the newer one it was relocated on the vehicle and no-longer part of the dash unit

[geordie white van man]

thanks for that mate, will check that out in a day or 2. will let you know wot happens with it.

[FredTransit]

Yup, I would say it's the voltage stabiliser, keep a close eye on the temp gage as well, if this goes up it deff is that. It could also be that the gage and the sender unit don't get on, you get this with the Mk2 if you try to fit the Mk3 sender. They must let through different amounts of current.