Hi Guys, i am new to Briskoda, but have found it very useful when troubleshooting any problems.

How to open the dash to swap the heater control switch set.

Racing rev counter, new throttle body, etc.

But i am having trouble with my fuel sender!!!

I swapped the pump and sender unit from a working car, didnt work??

I was convinced that the tank guage on the clock had failed. Got it checked out by Logic Automotive. It's working fine

i tested the rheostat on the sender, definitley current !

Today, i took out the pump unit and manually moved the arm up and down, hey presto it works.

Conclusion, my float dont!!

Anyone come across this before?

Or is there a more likley answer? as you cant see into the tank to see if the float, actaully does .

Try putting some petrol into a dish when you have the pump out and see if submersing it will cause the lever to move. Not heard of a float not working though and with it being pretty well protected in the fuel tank, I can't see how it would fail during use either.

Have you checked the circuit for continuity? Worth doing perhaps if all else fails to see if there's a break in the wires somewhere.

When you put the new fuel delivery unit in, did you make sure marks on the unit and tank lined up?

Try putting some petrol into a dish when you have the pump out and see if submersing it will cause the lever to move. Not heard of a float not working though and with it being pretty well protected in the fuel tank, I can't see how it would fail during use either.

Have you checked the circuit for continuity? Worth doing perhaps if all else fails to see if there's a break in the wires somewhere.

Hi Yashicamat,

I emptyed the pump and disconected the fuel lines to withdraw the pump and sender unit. I plugged in the electrics and and moved the float arm up and down and got good readings on the clocks.

I then tied a string to the float arm, submerged the pump and connected the fuel lines and ran the car, pulling the string up to see if the reading changed. and it did?????

I chased the loom back to the dash and found no abnormalities, breaks in the line bad earth, water damage etc.

Puzzled !!!!!!!!!!

The guy who ran the diagnostics on my clocks told me about a car that he had seen in the past. after lots of tests and head scratching he secured a small windscreen wash bottle to the float, and hey presto, it worked.

I have two octys and i swapped the pump form the other one and that never worked in this car, (The Guage) so i thought it was the clocks or the wiring.

I had the clocks checked. perfect.

I can't understand why you would get a good reading outside the tank and a negative one in the tank.

i'll try a couple of corks and cable ties first and see how that goes, fingers crossed.

Rory

When you put the new fuel delivery unit in, did you make sure marks on the unit and tank lined up?

Hi RWBaldwin,

Yep i refitted it correctly.

I swapped the whole unit with a working one and that never worked, but when i put that one back into its original it worked. lead me to think it was a wire ??? chased them back to the dash and found no problems.

The big arrow points toward the boot space.

Whe i put my spare back into it's original, it worked fine. leads me to think it is a wire.

gonna try the a float device tomorrow, see how that goes, keep ya posted.

Rory