[DeTomaso] Incorrect gas gauge

[charles buthala]

The circuit was designed by Ed Nauman.  He built one for me and it works great.  The gizmo works with a chip which uses the sending unit resistance, compares it to a look up table in the memory and sends the correct signal to the gage.  You have to go though a calibration cycle to set it up.  There is an article in the POCA news about two years ago on the circuit.  Ed if your listening I hope my description is correct.

"www.ProvaMo.com" <pantera007 at sbcglobal.net> wrote:   It was not "Me" Chuck that Ohm'ed, but I did test one gallon at a time, the
ohming was, I think, someone in the Nordic region perhaps.

Chuck


-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com]On
Behalf Of Mark McWhinney
Sent: Tuesday, July 24, 2007 10:41 AM
To: 'Garth Rodericks'; detomaso at realbig.com
Subject: Re: [DeTomaso] Incorrect gas gauge


Some of the fancier aftermarket gauges allow for multiple calibration
points. I think little Larry has that. If he is lurking, may he can fill
us in.

As I recall, Chuck did the one-gallon at a time work to record the ohm
readings.


-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of Garth Rodericks
Sent: Tuesday, July 24, 2007 10:33 AM
To: detomaso at realbig.com
Subject: [DeTomaso] Incorrect gas gauge

Just another reference point for the non-calibrated nature of our gas
gauges.

When mine is full it registers Full.
40 miles after fill up it registers at the 3/4 mark, or slightly below.
But I can drive for quite a long time between 1/2 tank and Empty.
And, at Empty the warning light comes on.

I have not tested how far I can go after the warning light comes on,
however the most I've
been able to add at a fill up was 19.5 gallons.

Now, I recall a year or two back that someone posted that they made a
simple electronic
converter to calibrate the fuel gauge. I think they took ohm readings from
the sender as they
filled the tank 1 gallon at a time, then created a mapping table to send
an accurate reading
to the gauge. Does anyone remember who that was? I recall they were
planning to make it
available for sale, but I never saw anything more on it. Does anyone have
more info? I'd like
one.

Cheers!
Garth
#4033

YMMV,
Garth
#4033


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