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Post Info TOPIC: gas gauge question
timbuk


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gas gauge question
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hey guys my 65 gmc 4x4  is on a 85 frame with dual 85 tanks and they are hooked uo to the 65 gmc guage im told the 65 guage works off 0 to 30 ohms and the 85 tanks are 0 to 90 ohms  how does a guy rectify this? feel free to crack a joke on my threads guys have a gas tanks a lot!



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beaumontguru


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RE: gas guage question
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When it comes to A body chevelles and beaumonts,  1964 was the last year for the 30 ohms. 65 and newer is 90 ohms.  Not sure of the trucks, but perhaps a similar switchover.  also  the A bodies have the ohm rating right on the float sender clearly labled. maybe check yours for a stamping



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timbuk


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http://www.67-72chevytrucks.com/vboard/showthread.php?t=779678 thx! i found this of course they change the cars and not the trucks! no gas guage SUCKS 



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DonSSDD


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Just keep 1 tank full at all times?biggrin

 

maybe an electronics store would have a converter to step down the 90 to 30?



-- Edited by DonSSDD on Thursday 21st of March 2019 04:52:26 AM

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timbuk


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i installed a equis guage 0 to 90 ohms and a new tank switch dual tanks work now and suage works but runs out before needle reads e but much better!

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timbuk


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https://www.amazon.ca/Equus-8362-Fuel-Level-Gauge/dp/B000EVYIFS/ref=sr_1_1?crid=B0M0SDWOKKBG&keywords=equus+gauges&qid=1553226729&s=gateway&sprefix=eqtuis%2Caps%2C212&sr=8-1



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4SPEED427


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How close to empty does it run out?

Maybe the float rod needs bent?.

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hawkeye5766


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Carl Stevenson wrote:

How close to empty does it run out?

Maybe the float rod needs bent?.

 Yup...full doesn't matter..but empty does! How deep is your tank? Remove the sending unit from tank and bend rod until gauge reads mt at depth of tank?



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4SPEED427


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Yes I was thinking if the rest seems pretty good it must be that. What else could it be?

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JC2+2


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Are you sure the 65 is 0-30 ohm? Because between the two, 0 ohm is empty for both so you should still read empty on the gage. And 30 ohm should read full on gage. With 90 ohm sender 1/3 tank should read full. After that overfull. If you bend the float so full tank reads full on gage Im pretty sure youll read empty too soon and Id rather know when tank is actually empty. But if you could bend the float so it reads full down to 3/4 instead of 1/3 and still get empty when its actually empty, I would live with that. Is there any way of transferring the old sender to the new unit in the tank?



-- Edited by JC2+2 on Friday 22nd of March 2019 11:24:39 AM

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hawkeye5766


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JC2+2 wrote:

Are you sure the 65 is 0-30 ohm? Because between the two, 0 ohm is empty for both so you should still read empty on the gage. And 30 ohm should read full on gage. With 90 ohm sender 1/3 tank should read full. After that overfull. If you bend the float so full tank reads full on gage Im pretty sure youll read empty too soon and Id rather know when tank is actually empty. But if you could bend the float so it reads full down to 3/4 instead of 1/3 and still get empty when its actually empty, I would live with that. Is there any way of transferring the old sender to the new unit in the tank?



-- Edited by JC2+2 on Friday 22nd of March 2019 11:24:39 AM

 Kinda what I was thinking. If you have the depth of tank and bend arm to read 0 at that depth(or close to)..all else is irrelevent mt is mt? 



-- Edited by hawkeye5766 on Saturday 23rd of March 2019 12:47:17 AM

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timbuk


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runs outa gas at quarter tank now and the other tank the sender not working pins the guage over full yes i think an adjustment of the float is required in the tank origional truck guage moves off full but thats about it having a guage that runs out at quarter tank and a second tank is alot better than before these tanks are a ball to work on

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