Fuel sender
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Melting Slicks
Joined: May 2001
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From: Mint Hill North Carolina
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Fuel sender
How and what do you guys use to move the fuel sending unit arm up and down when testing? I have not done this before and if it's not the problem I don't want to damage it.
Thread Starter
Melting Slicks
Joined: May 2001
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From: Mint Hill North Carolina
2024 C2 of the Year Finalist - Unmodified
2023 C2 of the Year Finalist - Unmodified
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Gavin, I tried that and can't really tell if I am under it, over it or actually moving it up and down. I can't see anything and the angle that the paint stick goes in doesn't feel as though it is far enough to the right. What am I missing? Thanks for your response.
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Melting Slicks
Joined: May 2001
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From: Mint Hill North Carolina
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Thread Starter
Melting Slicks
Joined: May 2001
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From: Mint Hill North Carolina
2024 C2 of the Year Finalist - Unmodified
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Gavin, I am quite sure it is the original sending unit, so yes, there would be a sock on the end. I tried a shorter paint stir stick and that didn't reach (I don't think) so not sure a longer stick would be at a different angle making it long enough. Yes, there is fuel in the tank and I don't think I can get my hand down into the tank.
Drifting
Joined: Sep 2017
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From: CT
I wouldent try getting your hand in, you may succeed and not get your had out, if there is fuel in the tank the sender should be off the bottom to some degree, if your a half a tank or more you may be going too far into the bottom and missing it. all you need to do is slip it underneath and lift up, I think you mean you used a longer paint stick.
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Thread Starter
Melting Slicks
Joined: May 2001
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From: Mint Hill North Carolina
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I wouldent try getting your hand in, you may succeed and not get your had out, if there is fuel in the tank the sender should be off the bottom to some degree, if your a half a tank or more you may be going too far into the bottom and missing it. all you need to do is slip it underneath and lift up, I think you mean you used a longer paint stick.
Drifting
Joined: Sep 2017
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From: CT
That should work, just lift up gently since you really don't know where you are and going by feel, I'm guessing your fuel gauge is not operating, Have you checked the connections at the sender, blown fuse?
Drifting
Joined: Mar 2018
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From: Oklahoma
C1 of Year Finalist (appearance mods) 2019
Not trying to steal the thread, but just got a new 62 (to me) and knew it had a fuel reading problem. Ran out of gas between 1/8 and /1/4 tank (during the test drive) and after 5 gallons put in, it registers 3/4 tank. Thought it might be just a loose wire, but now wondering it it's not the sender. Thoughts?
Butch
Butch
Drifting
Joined: Sep 2017
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From: CT
these gauges are not the most accurate, and they move around with the fuel shifting, however mine did the very same thing and it was my sending unit .Power to the sender, I was able to see that the gauge worked by moving the arm up and down . but it was off by at least a half of tank.
Drifting
Joined: Mar 2018
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From: Oklahoma
C1 of Year Finalist (appearance mods) 2019
I'll fill mine for the 1st time and see what it does and then just pay attention. I never let a car go below 1/2 tank. Maybe it just needs exercise as the car as been with a dealer for some time.
BH
BH
Thread Starter
Melting Slicks
Joined: May 2001
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From: Mint Hill North Carolina
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these gauges are not the most accurate, and they move around with the fuel shifting, however mine did the very same thing and it was my sending unit .Power to the sender, I was able to see that the gauge worked by moving the arm up and down . but it was off by at least a half of tank.
Melting Slicks
Joined: May 2004
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From: Willowbrook IL
St. Jude Donor '13-'14-'15-'16
I use this gripping tool. Just squeeze the flat spring separated handles together opening the jaws, release the handles and the jaws will pick up small dropped parts or the arm of the fuel sending unit to lift up or push down. The length of this pick up tool is about 25" overall.
Don
Don
Team Owner
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Army
There is always this device to precisely set the full and empty indications:
https://www.speedwaymotors.com/Speed...ule,66534.html
It should work on C1s and C3s but not C2s - I couldn't get it to work on a C2 Corvette presumably because they use a "powered" sending unit and a voltage divider setup - unique among older Covettes... The device is also buffered internally to smooth out the readings from fuel slosh...
https://www.speedwaymotors.com/Speed...ule,66534.html
It should work on C1s and C3s but not C2s - I couldn't get it to work on a C2 Corvette presumably because they use a "powered" sending unit and a voltage divider setup - unique among older Covettes... The device is also buffered internally to smooth out the readings from fuel slosh...
Last edited by Frankie the Fink; Mar 5, 2019 at 04:44 PM.
Race Director
Joined: Apr 2009
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From: Charlotte NC
I use a bent wire.....mainly the solid copper wire I have in my shop for wiring. it bends easy and i can easily lift the arm and or float on the end of the arm. I do this fora ll fuel tank sending units where I can see the float.
As for your wiring. You ahve 3 connections.....one is a GROUND....one is a 12 volt power supply when the key is on and usually it will be the wire that is black with the PINK stripe....the last wire should be the wire that goes to your gauge.
Keep in mind your connector for your rear body wiring at the left kick panel area....it can get dirty and loose good contact.
-0- to 90 ohms is what your sending unit should read when you test it manually....or thee abouts. So i have seen some sending units go as high as 110 ohms for example.
DUB
..
As for your wiring. You ahve 3 connections.....one is a GROUND....one is a 12 volt power supply when the key is on and usually it will be the wire that is black with the PINK stripe....the last wire should be the wire that goes to your gauge.
Keep in mind your connector for your rear body wiring at the left kick panel area....it can get dirty and loose good contact.
-0- to 90 ohms is what your sending unit should read when you test it manually....or thee abouts. So i have seen some sending units go as high as 110 ohms for example.
DUB
..
Race Director
Joined: Nov 2003
Posts: 10,696
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From: Cottonwood AZ
C1 of Year Finalist (performance mods) 2019
Not trying to steal the thread, but just got a new 62 (to me) and knew it had a fuel reading problem. Ran out of gas between 1/8 and /1/4 tank (during the test drive) and after 5 gallons put in, it registers 3/4 tank. Thought it might be just a loose wire, but now wondering it it's not the sender. Thoughts?
Butch
Butch