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Gas/fuel meter doesn't work
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Author:  WhiteFinish [ February 09 2012, 3:57 AM ]
Post subject:  Gas/fuel meter doesn't work

Why would a gas meter not work anymore ?

The light when I'm low on fuel still works. But the meter always indicates full (i wish it was !!)

Image

Author:  RobMinhas [ February 09 2012, 4:11 AM ]
Post subject:  Re: Gas/fuel meter doesn't work

I have a semi related question here.....

Ummm..... do all MX3s have fuel lights that come one when gas is low? I ask because mine has never gone off before....

Author:  Nd4SpdSe [ February 09 2012, 4:29 AM ]
Post subject:  Re: Gas/fuel meter doesn't work

You sure it's the gauge and not the sending unit in the tank? I've never replaced the gauge, but I've had to replace the sending unit before, maybe even twice, but the low fuel light is independant from the gauge needle, that seems to be a different sensor.

Author:  MrMazda92 [ February 09 2012, 4:51 AM ]
Post subject:  Re: Gas/fuel meter doesn't work

I'd test the sending unit first as well, I've had several fail in other cars.

Author:  WhiteFinish [ February 09 2012, 8:09 AM ]
Post subject:  Re: Gas/fuel meter doesn't work

So where could i find the sending unit ? How does it look like?

I've replaced the stock pomp with the walbro, perhaps I messed up the sending unit ?

Author:  MrMazda92 [ February 09 2012, 1:10 PM ]
Post subject:  Re: Gas/fuel meter doesn't work

Did this happen when you were modifying your gauge cluster?

The fuel pump attaches to the sending unit, I haven't personally had a reason to take mine out yet, but I would assume that it is under the rear seat with the pump. :D

Author:  WhiteFinish [ February 10 2012, 3:51 AM ]
Post subject:  Re: Gas/fuel meter doesn't work

Uhh.... it happend some years ago.. can't really remember when.

I just went to a gasstation when the light came on.

Author:  MrMazda92 [ February 10 2012, 6:40 AM ]
Post subject:  Re: Gas/fuel meter doesn't work

Hmm, well that's still not too bad... when my light is steady on I have almost exactly 3.2 Gallons left!

Author:  Nd4SpdSe [ February 10 2012, 11:56 AM ]
Post subject:  Re: Gas/fuel meter doesn't work

The sending unit is in the gas tank, accessible under the rear seat. It looks like this:

Image

That's for a 323, but nearly identical. That black square box is your floater.

Author:  mikeinaus [ March 07 2012, 11:58 PM ]
Post subject:  Re: Gas/fuel meter doesn't work

you can test the sender by putting a volt meter onto the 2 leads (screws) that the gauge needle uses for signal. with the pump assembly removed from the car have someone move the sending arm up and down while its attached to the harness and the ignition on(car off). voltage ouput between the leads should move up and down with the lever, if not replace the sender, if it does replace the gauge...

Author:  WhiteFinish [ March 08 2012, 6:22 AM ]
Post subject:  Re: Gas/fuel meter doesn't work

Thanks, for the tip

I've replaced both :)

Author:  WhiteFinish [ February 25 2018, 6:13 PM ]
Post subject:  Re: Gas/fuel meter doesn't work

Nd4SpdSe wrote:
The sending unit is in the gas tank, accessible under the rear seat. It looks like this:

Image

That's for a 323, but nearly identical. That black square box is your floater.


Super old topic bump.
Where did you find this sending unit? Did you get it via Ali Express? searching on what key words?

Author:  Nd4SpdSe [ March 15 2018, 2:46 PM ]
Post subject:  Re: Gas/fuel meter doesn't work

I got mine from Mazda directly....but we're going back many, many years.

Author:  Nd4SpdSe [ March 15 2018, 2:49 PM ]
Post subject:  Re: Gas/fuel meter doesn't work

https://www.ebay.ca/itm/Mazda-Mx-3-Mx-3 ... rm&vxp=mtr

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