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Eric_Kallio
Joined: 29 Jan 2006
Posts: 149
Location: Baton Rouge, LA
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 Posted: Mon Sep 26, 2011 12:12 pm Post subject: Fuel sender |
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When flying through some bumps the other day I lost my fuel quantity indications on the left tank. Didn't actually lose them, the indicated quantity went from 24 gallons to -12. After de-fuel it seems the float is still attached and moving free, but the resistance from the sending wire to ground is a consistent 176 ohms. It seems to me that there is a failure of the sending unit. Before I pull this apart and order a replacement has anyone seen this before, or have a step that I may have missed to troubleshoot the problem.
Eric Kallio
N518RV... Flying
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carl.froehlich(at)verizon
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| Posted: Mon Sep 26, 2011 12:53 pm Post subject: Fuel sender |
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First check the ground connection. If you do not run a separate ground wire to a ring connector under one of the screw heads, you may want to.
If the ground is good, you may have a bad sender. Considering you have some reading other than short or open I'd guess it is hung up on something. Not sure how you can know that it moving freely with the tank on the plane. Either way you need to pull the unit.
One other point, if you measured the sending unit resistance to ground in circuit (sending wire still attached to whatever it goes to), you may have a false reading. Remove the sending wire from the sender and measure again.
Carl
On Sep 26, 2011, at 4:12 PM, "Eric_Kallio" <scout019(at)msn.com> wrote:
| Quote: |
When flying through some bumps the other day I lost my fuel quantity indications on the left tank. Didn't actually lose them, the indicated quantity went from 24 gallons to -12. After de-fuel it seems the float is still attached and moving free, but the resistance from the sending wire to ground is a consistent 176 ohms. It seems to me that there is a failure of the sending unit. Before I pull this apart and order a replacement has anyone seen this before, or have a step that I may have missed to troubleshoot the problem.
Eric Kallio
N518RV... Flying
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=353267#353267
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dmaib(at)mac.com
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| Posted: Mon Sep 26, 2011 1:12 pm Post subject: Fuel sender |
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I will second the suggestion to make darn sure it is well grounded. I
replaced my right hand sender last year unnecessarily. I thought I
had a good ground, but I did not. Oh well, now I have a spare sender
if the RH ever really fails.
David Maib
40559
Flying
On Sep 26, 2011, at 4:12 PM, Eric_Kallio wrote:
| Quote: |
When flying through some bumps the other day I lost my fuel
quantity indications on the left tank. Didn't actually lose them,
the indicated quantity went from 24 gallons to -12. After de-fuel
it seems the float is still attached and moving free, but the
resistance from the sending wire to ground is a consistent 176
ohms. It seems to me that there is a failure of the sending unit.
Before I pull this apart and order a replacement has anyone seen
this before, or have a step that I may have missed to troubleshoot
the problem.
Eric Kallio
N518RV... Flying
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=353267#353267
|
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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