Since i got the car, the fuel gauge has not worked ... at first it would show 1/4 of a tank, even when more or less in there, not it always show like 3mm above zero..

 

So today ive replaced the sender unit under the passenger rear seat ...

 

Dam thing still shows the same >< 

 

Its doing my head it... the car runs fine, no issues on start, no stuttering, no signs the pump is failing... but the gauge has issues ...

 

The unit i pulled out look in very good condition..

 

Im guessing it cant be relays, then it would just completely fail, i have checked wiring all is fine, it will be, the pumps working ... the gauge though ...

Edited 12 March, 201511 yr by FromTheDarkness

Possibly the clocks faulty?

Are you any good with a test light or multimeter?

ye i can use a multi meter, i have tested the switch on the pump, its all working as it should.

 

So how do i go about getting behind the clock ... do i need to dismantle half my car :p

 

But whats confusing me, is goolgle says that faulty clock stop working, but mine moves a bit

Edited 12 March, 201511 yr by FromTheDarkness

ok come across this http://www.clusterrepairsuk.co.uk/repair/model/skoda-fabia-6y-instrument-cluster-speedo-repair-service 

 

What you think ?

I'm wondering why someone had previously been playing around with the wires at the sender unit. They had been cut and were swapped around in that pic you posted the other day. Obviously something funny has been going on there. Are they back to the correct way on your new sender unit?

They are but i got a replacement connector im going to rewire the and try it. I dont think it will back any differant .. 

 

I think the previous owner has attempted a fix, as the sender unit looks brand new that i have replaced... maybe he gave up after these attempts.

 

I also got a fuel gauge, instrument cluster fault on vcds lite.

Edited 12 March, 201511 yr by FromTheDarkness

on second thoughts is it working ???

 

Having acquired a new socket and wiring it in, it act just the same... i then spent some time on the interwebs, and things ive picked up are... if you take the sensor wires and earth them, and it shows full (in my case as the tanks full) then its the unit that's faulty, so it doesn't do this, it defo not the unit, its a new unit, its not the wiring on the socket, new socket.

 

I then spoke to the above company that specialise in cluster repairs, and i must say they where extremely helpful. And basically said its 90% not the cluster, as there is no erratic behaviour, the dial moves on ignition but only ever to 3mm, so always the empty light comes on and the dial read nearly empty... he said its eathed at the dial moves, maybe ecu problem, but doubts it as the car runs fine.

 

Know after much ******* about and thinking ... lol

 

Im wondering if its a collection of errors, and everything is working ...

 

When i picked the car up the gauge read 1/4 full, i drove 2 days a lot of miles (200+) the gauge never moved .. i suspected a issue, then filled up £38 ..(the max i could get in) then i noticed the wiring was wrong and recited it. Would £38 + 1/4  = max capacity ?

 

Is the car now showing empty because its using the expansion tank first???

 

So have i filled it to the max

Edited 13 March, 201511 yr by FromTheDarkness

At the current fuel prices, £38 plus 1/4 tank in mine makes it read almost full. That is petrol not diesel though. I should imagine it will be about the same though.

 

 

Is the car now showing empty because its using the expansion tank first???

 

Nah, it doesn't work like that. If it's full it should read full.

 

Did you did put the sender in the right way? There is an arrow on sender and tank that has to be lined up. Sorry for asking but you can't overlook the obvious when fault finding.

 

What about lifting the sender out and switching on the ignition and moving the float up and down to see if the gauge moves?

i marked the position 

 

At the current fuel prices, £38 plus 1/4 tank in mine makes it read almost full. That is petrol not diesel though. I should imagine it will be about the same though.

 

 

Nah, it doesn't work like that. If it's full it should read full.

 

Did you did put the sender in the right way? There is an arrow on sender and tank that has to be lined up. Sorry for asking but you can't overlook the obvious when fault finding.

 

What about lifting the sender out and switching on the ignition and moving the float up and down to see if the gauge moves?

I marked the position it was in when i removed it, but this also could have been wrong .. there is nothing else to go off - i dont see another arrow to line it up where is that on the metal surround?

 

hmm ye i will try lifting it out and testing, its dam messy tho

One arrow on the sender/pump and one on the plastic fuel tank.

 

One arrow on the sender/pump and one on the plastic fuel tank.

 

So there is a mark on the flange?

The flange can be twisted and put on any way, as can the sender unit, so i imagine both can be fitted and aligned in the wrong place ... i dont get it:P

No it's not on the flange. Looky here...

 

ohh i see, is that your picture?

 

Do me a favour if it is take i pic from outside of the rear door, so i can see the position of yours, 

 

I didnt even see a mark on the outside... maybe this is it, and the floater isnt sat right, fingers crossed !!

Yes it's a pic of mine but I took it ages ago. It may be a little different to yours as mine is petrol but I'm pretty sure they all have arrows to line up.

ok and when putting in must i put it in at this position or can i twist it, or am i risking the float getting stuck?

ok ive just had a look its no where near lined up, will have a fiddle in the morning..hold this space :P

ok and when putting in must i put it in at this position or can i twist it, or am i risking the float getting stuck?

 

Probably best to lift it out and move it in case you damage the float.

 

ok ive just had a look its no where near lined up, will have a fiddle in the morning..hold this space :p

 

not looking forward to that seal again .. 

Ok so ive lifted the pump out and moved the arm with ignition on and it works, so it was fitted incorrectly originally... how ever when fitting i cant for the life of me fit it so it reads correctly... i tried for 2 hours !!!

 

it seem to be too long and the bottom of the pump hits the bottom of the tank, and not matter what angle i attempt it, i can get the dam level to sit right ><

 

Ive fitted it reading incorrectly, for the time being, im going to run the fuel in there low and see if i can see what the heck is going on

 

Ive tried lowing it inline with the two line points, still doesnt seem to fit without bottom hitting and float is fouled, ive tried fitting then twisting, ive tried everything ... it drove me mad and ive had enough :P

Are you sure you've got the right pump/sender unit? Can you see the part number on it?

Ive tried 2 ... both with 

6Q0 919 050 but one is 6Q0 919 050A, other 6Q0 919 050D

 

Both are identical, i have this same issue with both. I think its my fitting. But is it usually so hard and fiddly to find the right spot for the float ?

Ive tried 2 ... both with 

6Q0 919 050 but one is 6Q0 919 050A, other 6Q0 919 050D

 

Both are identical, i have this same issue with both. I think its my fitting. But is it usually so hard and fiddly to find the right spot for the float ?

 

They seem to be the right ones. I'm baffled why you're having so much trouble with them.

They seem to be the right ones. I'm baffled why you're having so much trouble with them.

me too ... honest, its as if it is too big, length ways as the bottom seems to need compressing into the top, but then also the float seems to get stuck no matter where or how i put the sender unit in... maybe ive got a dead body in my fuel tank...

 

Im just going to run it near to empty as i can, as i cant see the bottom... i shouldnt have put fuel additive in also. as its all blue and cant see a thing ><

 

i might try to drain the tank .. somehow 

Edited 19 March, 201511 yr by FromTheDarkness

 maybe ive got a dead body in my fuel tank...

 

 

Ye olde way of telling if it was sender or gauge ,was to take wire off sender, and see if display showed empty. Full earth on sender wire and should show full. Fail that and sender was faulty. Without a wiring diagram, ( and Haynes has gone walkies at moment) I'd hesitate to suggest if that would work, but it should be possible to test the sender unit using a meter. Then if sender tests OK, use sender to test gauge.