fuel guage & computer

[Chris5044]

mmm im getting funny readings from my computer...
It predicts my tank is empty but my fuel guage is not in the red...
I drive it about no change...

10mins later it reads back to 30 miles to go .... ????
really strange .... what exactly is going on???

started happening recently

[volcano rs]

if you find out let me know .one minute i have quarter tank next minute its flashing empty then few minutes later back to quarter tank.

[jubjub]

Do get this myself.....When I bought the car and went to collect it, I filled the tank up 3/4 full and made my way home. Obviously the fuel went down, and when on the M25 about 25 miles from base the fuel gauge was showing me a quarter of a tank left. The computer was telling me I had 50 miles left. Thought I could make it back ( and then fill it with Optimax) so went past a turnoff. Within the space of a minute the computer went from 50m -40m then flashed the E and started bleeping like mad, but the fuel gauge was still showing just under a quarter......

In may last car, the fuel gauge/cpu display went hand in hand with each other. It would start flashing and bleeping when you hit the 30 miles left,and IIRC, went down in 5 mile increments.......
Could this be solved by going through the calibration process as described on S2Central.net listed here:

http://www.s2central.net/main_frame.html

Maybe I could get round to doing that at the garage meet

[Chris5044]

yeah maybe we could... mine used to work effectively

[Sidspud]

If the gauge shows fuel one minute and none the next then you have a knackered sender in the tank. The trip computer uses this info as well, so it's probably related.
I did a write up ages ago about how to check and fix the sender.
Do a search and you should find plenty of info.

[Chris5044]

thx for reply... but my guage seems fine .. it used to stick... now it doesnt....

its the predicted miles left thats fooked

[Ski]

I hate the way the dial predicts. I dont mind the computer telling me how many miles i got left, but the dial will go down at wot, then go back up when u calm the revs down.