Home » Public Forums » GMCnet » fuel gauge
 fuel gauge [message #225437] |
Sun, 13 October 2013 12:10  |
appie
Messages: 902
Registered: April 2013
Location: denmark
Karma: 2
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Senior Member |
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My new vdo/kienzle gauge doest not seem to work withe the oem sender it does show fuel but far less then what is in the tanks
I know there are problems with compatibility but do not know the solution
Can anybody h�lp me out here
VDO make 2 kinds 1 for a floater sender and 1 for a dip sender. Mine is for floater as I figured there would not be enough space in the tanks for anything to be dipped into it
Appie
eleganza 76 "Olga" now sadly sold
6 wheel discbrake
Quadrabags
Springfield stage 2 462 olds
Manny tranny
( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
Fulltiming in Europe july 2014 til july 2016
Denmark
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| Re: [GMCnet] fuel gauge [message #225926 is a reply to message #225914] |
Thu, 17 October 2013 07:59  |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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| appie wrote on Thu, 17 October 2013 05:20 |
So I got a 0-90 gauge, but still not happy
According to the oem tanks are about 1/4 plus I can hear the fuel switch klik
On the new gauge one tank is 1/8 and the other is empty ( in off it is well below empty)
The multimeter shows 86 Ohm on the 1/8 tank and does not react on the other tank
I thought the might be a not oem sender but it seemed to work fine with the oem gauge
Help please
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Appie,
The OEM instrument is not very good and was not (IMHO) when it was new. That type of instrument can decide to not respond at some times, and an open sender can be one of those times.
If by "does not react" you mean it reads infinite resistance, that would indicate either a bad connection or a failure sender in that tank. Unfortunately, the OE senders are very prone to failure with alcohol blend fuels. There is also a function underneath the coach where the coach harness meets the fuel selector valve and the wires from the senders from both tanks. I have had to deal with poor connections there.
I have forgotten the gage current that the AC gages used, but it was significant and much more than any reasonable VOM would use for resistance measurement. If the sender is not in good condition, it may require more current than you are providing with your test instrument.
Good Luck
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] fuel gauge [message #225947 is a reply to message #225926] |
Thu, 17 October 2013 11:13 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Guys, please remember, Voltage varies constantly as does state of charge in
wet cell batteries. It is not uncommon to see voltages from 11.8 to 15.1 or
so. If you don't think that has an effect on the accuracy of
instrumentation, you are reading a different service manual than the ones
I learned my trade from. The gages are not lab quality, and the conductors
are all 40 years old. + or - 1/8 of a tank sounds about right to me. If it
really concerns you, fill your tanks up, quit driving on fumes, and worry
about something really important like oncoming traffic and how impaired
they might be. (grin)
Jim Hupy
Salem, Or
78 Gmc Royale 403
On Oct 17, 2013 5:59 AM, "Matt Colie" <matt7323tze@gmail.com> wrote:
>
>
> appie wrote on Thu, 17 October 2013 05:20
> > So I got a 0-90 gauge, but still not happy
> > According to the oem tanks are about 1/4 plus I can hear the fuel
> switch klik
> > On the new gauge one tank is 1/8 and the other is empty ( in off it is
> well below empty)
> > The multimeter shows 86 Ohm on the 1/8 tank and does not react on the
> other tank
> >
> >
> > I thought the might be a not oem sender but it seemed to work fine with
> the oem gauge
> >
> > Help please
>
> Appie,
>
> The OEM instrument is not very good and was not (IMHO) when it was new.
> That type of instrument can decide to not respond at some times, and an
> open sender can be one of those times.
>
> If by "does not react" you mean it reads infinite resistance, that would
> indicate either a bad connection or a failure sender in that tank.
> Unfortunately, the OE senders are very prone to failure with alcohol blend
> fuels. There is also a function underneath the coach where the coach
> harness meets the fuel selector valve and the wires from the senders from
> both tanks. I have had to deal with poor connections there.
>
> I have forgotten the gage current that the AC gages used, but it was
> significant and much more than any reasonable VOM would use for resistance
> measurement. If the sender is not in good condition, it may require more
> current than you are providing with your test instrument.
>
> Good Luck
>
> Matt
> --
> Matt & Mary Colie
> '73 Glacier 23 Chaumi�re (say show-me-air)
> Now with 4 working Rear Brakes
> SE Michigan - Twixt A2 and Detroit
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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