fuel gauge problem

[adi1]

can anyone help i have a e30 convertible 2.7 1987 and have problem with fuel gauge not quite sure what it is when switch ignition on the gauge goes to the top even when empty and the light is on

[Grrrmachine]

http://www.e30zone.net/e30zonewiki/inde ... Fuel_Gauge

[magpie]

you probably need a new sender unit located under the rear bench on the passenger side beneath the black inspection/access cover .

[Brianmoooore]

If this has a 62 litre tank, with two level senders, it's unlikely to be a sender fault, since both would have to be faulty for the gauge to read permanently full.
If this is the case, it's more likely to be the brown/green wire shorted to earth somewhere.

[adi1]

Ok cheers its a 55 litre tank I will check wiring is there any way to test sender

[Brianmoooore]

Pull the three pin plug off of the level sender on the fuel pump assembly. If the gauge drops to zero, the sender is the problem. These often get damaged when someone tries to remove the fuel pump without removing the sender first.

[adi1]

ok cheers i will try that

[mcbonio]

If this is the case, it's more likely to be the brown/green wire shorted to earth somewhere.

Sorry to hijack although it might be op's next questions, where is the ground point for the fuel senders?

[Brianmoooore]

LH side of rear seat, in a saloon.

[mcbonio]

Under the rear bench? I had a look and couldn't see it.

[greg124]

If it turns out to be a faulty sender, I have one.

[adi1]

i have taken the wires of and it drops to zero so ive taken the sender out and now it stops on half if you turn sender upside down the gauge goes to full and the light goes out turn up the right way and it drops back to half and light comes back on would that be sender?

[Brianmoooore]

Any chance that the fuel gauge is for a 62 litre tank?

[adi1]

It might be that what I been thinking but don't know if they genuine or not