Author Topic: Connecting fuel level sensor to VEMS Round  (Read 686 times)

Offline Grimmie

  • New Users
  • *
  • Posts: 1
  • BHP: 0
Connecting fuel level sensor to VEMS Round
« on: October 24, 2021, 09:55:04 am »
Hi all,

I'm new here but using a VEMS Round for years now. It is my main AFR gauge and also connects to the MS DIY PNP.

I have recently changed my dashboard and removed the stock fuel gauge.

I have noticed the VEMS Round has a second line of digits which is now unused.
If possible I would like it to display the fuel level in my tank (so I don't run out ;)).

However I don't know where to start, anybody here how as som experience doing this and could help?

What I know:
Miata fuel sensor reads 5 Ohms full and 114 Ohms empty.

To which cable do I connect the sensor lead?
What settings do I use in the VEMS tune software?
And finally, is simply wiring it in enough, or will I need a signal conversion before wiring it in?

Hope someone can help, thanks!

Offline Kamuto

  • Hero Member
  • *****
  • Posts: 811
  • BHP: 19
Re: Connecting fuel level sensor to VEMS Round
« Reply #1 on: October 27, 2021, 01:12:18 am »
Hi all,

I'm new here but using a VEMS Round for years now. It is my main AFR gauge and also connects to the MS DIY PNP.

I have recently changed my dashboard and removed the stock fuel gauge.

I have noticed the VEMS Round has a second line of digits which is now unused.
If possible I would like it to display the fuel level in my tank (so I don't run out ;)).

However I don't know where to start, anybody here how as som experience doing this and could help?

What I know:
Miata fuel sensor reads 5 Ohms full and 114 Ohms empty.

To which cable do I connect the sensor lead?
What settings do I use in the VEMS tune software?
And finally, is simply wiring it in enough, or will I need a signal conversion before wiring it in?

Hope someone can help, thanks!
you will need strong pullup to signal something like 500 ohm would work , pullup means resistor between 5v and signal wire, and then you need to calibrate some sensor
Vems installer in Lithuania
[email protected]