TD5 Fuel guage problems

[kennyb87]

I've got a problem with my Td5 where my fuel gauge reads wrong and it all started when the fuel pump was out and I had a new one in but I've since gone back to my original pump yet the gauge still reads incorrectly, does anyone have any ideas itll read absolute empty at around 300 miles when i should have at least 4 gallons left. I'm assuming the wiring is to blame but I haven't touched any of it

 

[Anaconda]

Mine will start off full, then empty, then gets fuller as the day goes by.
Earth most likely somewhere, it's isn't the pump in my case.

 

[scott3933]

Mine will start off full, then empty, then gets fuller as the day goes by.
Earth most likely somewhere, it's isn't the pump in my case.

Mine is constantly somewhere between 1/4 and 1/2, it's like fuel roulette. I really need to look into it, feeling like it very much could be an earth issue or something else electrical as I had issues with the temp gauge to begin with too.

 

[miktdish]

Don't you just take the fuel pump and sender out and bend the wire (with the float on it) until it's right ??

 

[Anaconda]

Don't you just take the fuel pump and sender out and bend the wire (with the float on it) until it's right ??

Previous owner had the pump changed for the same problem just before I bought it. He thought it was fixed until he filled it with fuel the morning I went to collect it. He then went on to knock £500 off the price along with giving me a full tank of fuel.
So my problem must be elsewhere with some wiring somewhere. I'm not too worried and go by mileage instead.

 

[the_wolf]

Earth issues. I had this with my fuel and temp guages where they would fluctuate by themselves with the fuel guage occasionally dropping to zero despite plenty fuel in the tank. It was especially apparent with the side lights on. Not only did I find chaffing to the fuel sender earth wire at the side of the tank but there was also a fair bit of chaffing and damage to the loom itself when I pulled it out of the chassis rail (I was doing a chassis swap, unless you want a pain in the hole trying to get it back through or really really want to fix the problem I don't recommend it). Repaired all the damage and never had a problem since.

 

[kennyb87]

Previous owner had the pump changed for the same problem just before I bought it. He thought it was fixed until he filled it with fuel the morning I went to collect it. He then went on to knock £500 off the price along with giving me a full tank of fuel.
So my problem must be elsewhere with some wiring somewhere. I'm not too worried and go by mileage instead.

I've been going by mileage too but it's some I'd rather have sorted. I actually ran out of diesel once because the drain screw on the fuel filter came loose and with the fuel gauge not being trustworthy and only having 250 miles since refuelling I fobbed it off

 

[Anaconda]

I've been going by mileage too but it's some I'd rather have sorted. I actually ran out of diesel once because the drain screw on the fuel filter came loose and with the fuel gauge not being trustworthy and only having 250 miles since refuelling I fobbed it off

Fair point, maybe one day I will get round to it. Pain getting to the pump and loom though.

 

[Squonker]

Mine reads full every time I leave the garage forecourt, then slowly reads less and less the more that I drive it. I found I could fix the problem by going back to a petrol station (any one will work) and filling the tank with diesel. Hope this helps.