Hi, I have a Koso RX2n+ and a CBS fuel sender and i can’t seem to get the two working properly. In the setting menu, you have 2 settings “100” and “510” on 100 it says the tank is near empty when it's full and when it on 510 it's say it’s only ¾ full when it full. Can anyone help??????

[Edited on 18/6/10 by RMarine]

I would say you could have a 300 ohm sender. What are the results when empty, it might be possible to adjust the output using 2 resistors.
Darren

on the 510 setting, when the tank is empty it reads empty.

I think your fuel sender and your dash are not a match made in heaven

Personally as long as it reads empty when you're empty I'd stick with the 510 ohm setting.

You could change the fuel sender but it's a pain. you can add resistors so that it'll read full when it's full but then it'll read 1/4 full when its empty. Having driven a car which ran out of petrol when the dial read 1/4 full I can confirm it's rather annoying. I personally wouldn't care if the dial reads 3/4 full when the tanks brimmed.

I'm strugglig with the same problem. I think most car sender are about 260ohms and work in the opposite direction to the Rx2n. I don't know about the CBS sender but I think with an arm type that you could bend the arm through 90degrees and get it to opperate in the opposite direction. In terms of the range you could put a resister in parallel and use the 100ohm setting on the Rx2n. The full and empty would be OK but it would not be linnear.

For a 260ohm sender you'd need a 160ohm resistor in parallel to give 100 ohms.

Another alternative would be to get the sender off a bike.

try bending the arm on the sender it may not be floating to the top or it could be resticted.

Have you teis with the sender out of the tank and manually raised the floa to see whether you get te same reading. My sender had to be cut down as it was too long preventing it registering when full

On the old ford arm senders you can unsolder the wire from the reostat and solder to the other end swapping the out put so it reads the right way on the guage, however the range is still wrong so I read 1/4 full when empty

From what I've seen, that is a very minor problem. My sender is installed backwards and my tank removal to change it requires taking the whole back end off the car. I am happy with FULL tank = 0 on the gauge, and EMPTY tank = full on the gauge. Hey, it's a quirky car to begin with.