Topic

Hi all,
this question has probably cropped up before but has anyone fitted a low fuel level system to an MGF/TF?
I know they didn't have one on models up to the Chinese variant but I believe they may have been fitted to later cars.


thanks
Mike

You can approach this from several directions & I've tried most of them & until recently I've been dissatisfied with them all. I designed a simple comparator circuit which compared the gauge voltage with a present level & when the gauge voltage dropped to that of the preset an led would come on. This worked but was erratic, so I devised a more sophisticated idea with only slightly improved results. I then tried a non contact sensor on the tank & having taken the car to pieces to gain access to the tank, the device I'd chosen didn't operate on non conducive fluids. After more research (that stuff I should have done at the outset) I came up with a device which responded in a predictable way. It was world class at telling me that petrol sloshes around as a car travels down the road, even after I engineered hysteresis to counter the wayward response. I knew this could be problematic but not to the extent that it was.
Whilst scratching about looking for a better way of damping the system I found the answer & although its not covered many fill ups I'm happy that no amount of buggering about will improve things.
And I can't find reference to it just now because it's going on for eleven o'clock, I'm in bed & the information is in the workshop.
You'll have to wait until tomorrow. Mike.

This has all the makings of Airportable picture debarcle. I've just copied the e-Bay page for the low fuel device & it might just work, however - - - - - - - - - - - - - !

Works with a conventional gauge
will work on most vehicles that have a resistive sender
Does NOT need a special low fuel sender, works with ordinary senders!
Very small size (15 x 13 x 9mm) means it will fit INSIDE most fuel gauges or Instrument panels.
Turns on an :LED when the fuel level gets low.
Switch point fully adjustable.
Includes Wide viewing angle Water Clear 3mm RED LED and mounting bezel.
Works with senders that have a high resistance when empty
Works with senders that have a low resistance when empty.
tested with senders from 0 - 60 Ohms up to 0 - 500 Ohms
tested with senders from 60 - 0 Ohms up to 500 - 0 Ohms.
The module has four connections, Power, ground, sensor and LED.
When fitted inside a stand-alone gauge, no external connections required
The module has an anti-slosh circuit that makes it respond very slowly to changes in the sender signal.
this means it ignores the changes due to fuel sloshing in the tank or short hills etc.
Adjustment is by turning the small adjusting screw on the high quality 25 turn trimmer

Full instructions included
provided with double sided tape on the rear for fixing

four connections, +12, Ground, Sender, LED

every unit hand built, and tested by us!

for the technically minded, all except the 25 turn potentiometer are surface mount components
the capacitors are not electrolytics that have a limited lifetime, but multi-layer ceramic caps that will outlast the car !
This unit is the latest in a long line of low fuel warning modules we have designed and it incorporates everything we have learned.

below is what it looks like in a TVR/Telemetrix fuel gauge.... there is more than enough room!
In the example below, the supplied LED bezel was discarded and silicone used to fix the LED

Business seller information
Spiyda Ltd
Chris Horne
54 Bridgnorth Road
Wollaston
Stourbridge
West Midlands
DY8 3QG
United Kingdom

This?
Miniature LED Low Fuel Warning Light Module (screw terminal) -788- Buy It Now