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C

CRS

Well-Known Member
Posts
432
Ive had an ongoing problem with my fuel guage-it keeps reading full. Ive just fitted a new sender unit and its still doing the same. Ive also checked the earth and still no joy, traced the wires back to the clock and i cant see anything wrong. So what would make the guage shoot over to full every time when i know ive got half a tank of fuel?
By the way its a 1987 LWB diesel.

Cheers
Chris
 
CRS said:
Ive had an ongoing problem with my fuel guage-it keeps reading full. Ive just fitted a new sender unit and its still doing the same. Ive also checked the earth and still no joy, traced the wires back to the clock and i cant see anything wrong. So what would make the guage shoot over to full every time when i know ive got half a tank of fuel?
By the way its a 1987 LWB diesel.

Cheers
Chris
Click to expand...

Wish mine read full all the time a dream aaahhh!!!
 
CRS said:
Ive had an ongoing problem with my fuel guage-it keeps reading full. Ive just fitted a new sender unit and its still doing the same. Ive also checked the earth and still no joy, traced the wires back to the clock and i cant see anything wrong. So what would make the guage shoot over to full every time when i know ive got half a tank of fuel?
By the way its a 1987 LWB diesel.

Cheers
Chris
Click to expand...
There is a short on the red (i think - positive) wire - the resistance increases as the tank empties so because it's shorting it thinks it's full all the time. Use a multimeter at intervals along the length to check, but the usual culprit is somewhere roud the back of the fuse box. Give it a twiddle and see!...

And NOO not the mixture ratio again please!!!
 
Ok thanks Odenne. Its funny you should suggest that as ive managed to check the wire from the sender unit to where it comes out in the engine bay. It then goes into a socket and disappears into the back of the fuse board which ive not managed to check with a meter. I did wiggle the wires around there but nothing happened but i will look further into that.

Cheers
Chris
 
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