Post #1
I've setup an oil temperature gauge for my car, but it only gets to about 50 degrees under normal driving and nearly to 75 when sat idling for a few minutes. If I drive fast it does go up a bit as well, but only a fraction. At first I thought it was a bad earth, but now I've earthed it to a bolt screwed into the chassis and the backlight is also using that earth and it is working fine. I could have sworn when I earthed it to a bolt before with a different wire, it read about 100 degrees which would have been right, however on the earth wire that I am using for the gauge I soldered the wire into the spade plug so it definitely has a connection to it. The other thing is, I am using an 'add a circuit' connector off a switched live from the fuse box, I've got one 15 amp fuse in one slot and nothing in the other, might that have something to do with it?
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displaying posts 1 to 7 of 7
| Author | Subject: Oil temperature reading (incorrect?) |
 flynn_
Junior User  Location: Faketown Registered: 29 Jan 2011 Posts: 59 Status: Offline |
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 Posted 15th Feb 2011 at 02:41
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daveyboy
aka Jim Davey  Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #2
100 degrees seems a little warm and 50 seems low, is the guage the right sort to work with the sender?________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 15th Feb 2011 at 02:43
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rikky
Pikey Location: cheshire Registered: 28 Feb 2004 Posts: 26,797 Status: Offline |
Post #3
i have this same issue with a gauge i had made, driving me mad  ________________________________________ 306 rallye reproduction decals (full sets/individual decals) | 306 b-pillar textured vinyl weatherstrips306 slam panel esso stickers | 306 yellow / orange / pension fund red side door badges gti6 inlet manifold badges | 306 rear boot badges (p2/p3) winner of Extraction of toys from prams with outstanding vigour award 2009 [source: gti6 owners club] |
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Posted 15th Feb 2011 at 02:46
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flynn_
Junior User Location: Faketown Registered: 29 Jan 2011 Posts: 59 Status: Offline |
Post #4
daveyboy wrote: 100 degrees seems a little warm and 50 seems low, is the guage the right sort to work with the sender? Yeah mate, it came with the sender I'm using. |
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Posted 15th Feb 2011 at 02:57
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flynn_
Junior User Location: Faketown Registered: 29 Jan 2011 Posts: 59 Status: Offline |
Post #5
No one cracked this problem successfully then? |
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Posted 2nd Mar 2011 at 00:47
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phillipm
Seasoned Pro  Location: Rotherham Registered: 15 Oct 2006 Posts: 20,607 Status: Offline |
Post #6
When you say the backlight is using the same earth, do you mean the gauge is earthed to the same point? Or the sender itself? Usually the sender earths through the block, but if can't get a clean connection because of oil/dirty threads you might need to run a copper ring connector under it and earth it to the chassis directly. ________________________________________ - Bespoke rollcages/additions/adjustments. Half cages right up to complete custom spaceframes - MSA/FIA spec, CDS, ROPT, T45, etc - PM meEmail me! Custom-made polybushes available - need an odd size or fitment? - anything from batch work to one-off pieces. |
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Posted 2nd Mar 2011 at 00:52
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owain
Seasoned Pro  Location: Essex Registered: 20 May 2009 Posts: 9,185 Status: Offline |
Post #7
Where's the sender? Is it a sump plug one or an inline one?________________________________________ Membership expiring soon, get in contact on our new little forum project. |
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Posted 2nd Mar 2011 at 02:27
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