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  #1  
Old 05-15-2018, 07:23 PM
Shawncfc Shawncfc is offline
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Default Fuel sender unit

Has anyone used the sending unit sold by macs auto on a 58? They have one that says universal so I'm wondering if it would drop right in or do I have to make it fit. Or maybe there is one available somewhere else that works better
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  #2  
Old 05-15-2018, 07:29 PM
Hogan Hogan is offline
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You may want to try RockAuto

Spectra pn: FG98A

https://www.rockauto.com/en/catalog/...ding+unit,4436
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  #3  
Old 05-15-2018, 07:30 PM
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jopizz jopizz is offline
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Buy one from Rockauto.com. They have two listed. Both are identical to the original plus we get a 5% discount.

John
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  #4  
Old 05-15-2018, 08:11 PM
Shawncfc Shawncfc is offline
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Thanks I ordered the one for 59 bucks. Hope it comes with a gasket
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Old 05-16-2018, 11:01 AM
Deanj Deanj is offline
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I had the fuel sending unit replaced with the new fuel tank installation. Is there a way to calibrate the sending unit other than trial and error?

The old unit only read to 3/4 full with a full tank, but the tank still had gas when the gauge read close to E. The new sending unit reads F when full, but the tank is 3/4 empty at the 1/2 mark.

Dean
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  #6  
Old 05-16-2018, 02:16 PM
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YellowRose YellowRose is offline
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Default Fuel sender unit

Dean, the information on adjusting the Fuel and Temperature gauge is in the Technical Resource Library (TRL). Here is the link to it. Check it out.

http://www.squarebirds.org/picture_g..._adjusting.htm
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Old 05-16-2018, 04:43 PM
Tbird1044 Tbird1044 is offline
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Dean:
I has some similar issues and finally figured out I had the wrong sending unit. Bought another one and things worked fine.
I did check the sending unit when it was out of the gas tank by hooking it up and moving the float from the full down to full up position to see how the gauge would respond. There is a slow response time so take your time if you decide to check it this way. I think it is an easier step than messing with the gas gauge itself.
I can't remember if the sending unit is oriented with a tab for position in the tank, but I think it is. As I recall, the float arm should be pointing towards the front of the car. If not it could be bottoming on the bottom of the tank and not reading the gas level. Just a thought.
Also the manual says to use 2 flashlight batteries (3V) and connect that to the fuel gauge. With the 3V supplied it should read "approximately full".
Nyles
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Old 05-16-2018, 10:00 PM
Deanj Deanj is offline
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Thanks Ray and Nyles.

I recall the previous owner explaining he set the sending unit so the tank wouldnít be empty before the needle pointed to E. So he had a problem with the tank going empty prior to the needle pointing to E. Thatís why he adjusted the sender so he wouldnít run out of fuel when the gauge read 1/4.

I suppose it is possible that when my gauge reads half, I might have about 7 gallons left, or so. Thatís just an estimate. And the gauge runs to E normally.

Dean
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Old 05-19-2018, 09:21 AM
Shawncfc Shawncfc is offline
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Yep hole in the float. Thanks for the suggestions on the new sending unit. Fit right in . 5 minutes and done. Now to see how accurate it is.
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  #10  
Old 05-20-2018, 10:33 PM
Shawncfc Shawncfc is offline
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Quote:
Originally Posted by Tbird1044 View Post
Dean:
I has some similar issues and finally figured out I had the wrong sending unit. Bought another one and things worked fine.
I did check the sending unit when it was out of the gas tank by hooking it up and moving the float from the full down to full up position to see how the gauge would respond. There is a slow response time so take your time if you decide to check it this way. I think it is an easier step than messing with the gas gauge itself.
I can't remember if the sending unit is oriented with a tab for position in the tank, but I think it is. As I recall, the float arm should be pointing towards the front of the car. If not it could be bottoming on the bottom of the tank and not reading the gas level. Just a thought.
Also the manual says to use 2 flashlight batteries (3V) and connect that to the fuel gauge. With the 3V supplied it should read "approximately full".
Nyles
Nyles
When i took the old one out the float was towards the filler neck.
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