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1968 torino gass gauge problems |
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Spencer 
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Joined: 07-January-2020 Location: Ny Status: Offline Points: 57 |
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 Topic: 1968 torino gass gauge problemsPosted: 22-January-2023 at 1:44PM |
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I'm having problems with my gass gauge. I drained the tank then I replaced the sending unit and the gauge. It is reading full when the sending unit is out of the tank and I am manually lifting it up. When I drop it down all the way the gauge is reading 3/4 full. I tried putting it in the tank and holding it there and it still reads 3/4. Done anyone have any ideas on this problem
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hogfiddles
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Joined: 19-September-2016 Location: Central NY Status: Offline Points: 1441 |
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Posted: 22-January-2023 at 3:52PM |
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Sounds like either it’s still faulty, or you may have a wire shorting somewhere....or, possibly a faulty gauge in the cluster
Edited by hogfiddles - 23-January-2023 at 4:12PM |
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1973 Gran Torino Sport - Q code “Q-Clone” project-on-hold
1972 Gran Torino Sport - Q code new project 1972 Gran Torino - parts 1969 Torino GT - M code 95+/- mid-80's Yamaha XJ-Series (10 trophies) |
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Spencer
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Posted: 23-January-2023 at 2:06AM |
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Would a different gauge be not compatible? the new gauge is a bosh 3 post
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californiajohnny
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Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14566 |
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Posted: 23-January-2023 at 4:07PM |
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resistance value must closely match the sending unit!!! many aftermarket gauges are way off from the oem sender...usually reads 3/4 most of the time...
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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Spencer
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Posted: 24-January-2023 at 2:02AM |
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I just looked up the ohms for the gauge it says they it should read 73 - 10 ohm for that gauge could the problem be that the new gauge is 240- 30 ohm
That makes sense but the old gauge was original and this problem still happened so I tried bypassing it Can you expand on that last comment what is the resistance value?
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Spencer
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Posted: 24-January-2023 at 2:09AM |
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Sorry im not very knowledgeable about wiring. We are talking about the same thing. Shouldn't the old gauge work then because it has the right resistance value? Maybe I need to send it out to get rebuilt?
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californiajohnny
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Posted: 24-January-2023 at 8:03PM |
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resistance in ohms the new gauge being a higher range it wont read correctly!
i recently had to figure out the range for my mustang... bought a new sender and using all aftermarket gauges, the fuel gauge had different settings on the back... just had to find the ohms range of the sender... what a pain but finally searching several new listing i happened to find one that had the range listed!!!  switched the gauge settings and bam it worked correctly (well bench testing anyway) |
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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Spencer
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Posted: 25-January-2023 at 1:44AM |
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Thats awesome it a great moment when things just start to work after putting time into it. Do some of these gauges have setting on them to change the ohm? How did you change the setting
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Spencer
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Posted: 25-January-2023 at 1:58AM |
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It just had a switch of some kind? What kind of gauge did u get? The one I have doesn't have that option
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californiajohnny
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Posted: 25-January-2023 at 8:11PM |
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glowshift
you can see them on this page of my mustang thread... https://forum.grantorinosport.org/johns-built-not-bought-mustang_topic16716_page25.html Edited by californiajohnny - 25-January-2023 at 8:33PM |
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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Spencer
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Posted: 26-January-2023 at 6:41AM |
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Thanks for the link
Does anyone have a wiring diagram with color for the dash I'm going to try and see if my old gauge works with the new sender
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