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Thread: Smiths Fuel Gauge To Tank Sender

  1. #1 Smiths Fuel Gauge To Tank Sender 
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    I am in the process of updating the electrics on my roadster. I have installed a 52mm diameter Smiths Fuel gauge, this is to be mated to the existing fuel tank (which I believe is out of a mk2 Ford escort). The sender unit supplied with the gauge is a 2 pole unit fixed to the tank with 6 screws. The existing sender appears to be single pole push fit to tank. With the new gauge plugged in to the existing sender, an empty tank still registers half full on the gauge. Anybody know how to get an accurate fuel reading?

    Can be contacted on 01389 849 105 if necessary.
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  2. #2 Re: Smiths Fuel Gauge To Tank Sender 
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    Message originally posted by: Don
    Nope mines always been like that too. Any advice will be very welcome
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  3. #3 Re: Smiths Fuel Gauge To Tank Sender 
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    Me too Learned to live with it, but indeed a solution would be nice!
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  4. #4 Re: Smiths Fuel Gauge To Tank Sender 
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    have you tried fixing an earth wire to the other connection
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  5. #5 Re: Smiths Fuel Gauge To Tank Sender 
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    Message originally posted by: Alan Hogg
    I fitted a universal sender[see europa spares] and smiths fuel gauge when i built my roadster[escort tank] and had no problems with reading in relation to contents .You will need to wire thro' a voltage stabiliser this way
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  6. #6 Re: Smiths Fuel Gauge To Tank Sender 
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    Message originally posted by: Stefan Carlton
    Mrk2 Fiesta Diesel sender on mine (as the old one sprung a leak).

    But, who cares about a massively accurate level - all you need to know when your fuel is running low enough to warrant topping up and a linear motion to that point. In that light all I did was bend the bar on the float to ensure it was above the intake. Now should the guage start to read low, I know I have a bit left, but need to top up.

    I made sure I didn't bend it too far mind, I get around ?24 @ 80p lt from a low tank and it's just the standard Ford Escort Mrk2 tank (8gallon)
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  7. #7 Re: Smiths Fuel Gauge To Tank Sender 
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    I ran out at just under a 1/4 full just after finishing the car, so I know where empty is..! It's still on the "to do" list after 18 years but keeps getting pushed down to the bottom.
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  8. #8 Re: Smiths Fuel Gauge To Tank Sender 
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    I set the trip to zero when I fill it up and know that when I get to 140/150 I've still about a gallon+ left
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  9. #9 Re: Smiths Fuel Gauge To Tank Sender 
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    There are 3 or 4 different electrical standards for gauges and senders. The standards are normally expressed in terms of their ohmic values at the low and high end of the scale shown on the gauge. So a typical European standard would be 10 ohms at empty and 180 ohms at full for a fuel gauge/sender combination. In North America you may find gauges that are 240 ohms at empty and 33 ohms at full.
    Smiths follow the European Standard, so if you have compatible senders, then that's fine, if you don't then you will need to use matching senders and although I've used a fuel gauge as an example, the same is true for all electrical temperature and pressure gauges as well.
    It seems logical then that the Escort sender when in the empty position is giving a 90 ohm signal making your new gauge read half full. You could try an inline resistor but if the total "range" is not the same ie. 170 ohms, then your gauge may never read full. If I were you I would fit the new sender. You can get your gauges recalibrated but it costs abit.
    Hope this helps.
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  10. #10 Re: Smiths Fuel Gauge To Tank Sender 
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    My son's roadster never read correctly,we tried an inline resistor to no avail.The car was sold and taken to Spain before we got round to sorting the problem!!
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