How do you calibrate a fuel gauge?
Printed From: The Ford Torino Page
Category: Model Specific Forum
Forum Name: 1972-1976 Ford and Mercury
Forum Description: Technical discussion for 1972-1976 Ford and Mercury
URL: https://forum.grantorinosport.org/forum_posts.asp?TID=18021
Printed Date: 19-April-2024 at 2:29AM
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com
Topic: How do you calibrate a fuel gauge?
Posted By: bellj
Subject: How do you calibrate a fuel gauge?
Date Posted: 05-May-2019 at 4:23AM
| My car is a 72 Gran Torino with a GT gauge cluster. I replaced the fuel sender and now the fuel gauge does not read correctly. I removed the fuel gauge from the cluster. On the back of the gauge there seems to be 2 places to adjust the gauge. 1 adjustment in the upper left of the gauge and one on the lower right of the gauge. Does anyone know what these adjustments do? Does 1 adjust the full and the other adjust the empty? I tried calibrating the the gauge using the adjusters but I don't seem to be making any progress. Any help would be greatly appreciated |
Replies:
Posted By: Rockatansky
Date Posted: 05-May-2019 at 7:51AM
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bend the float rod in the tank, where the discrepancy began ------------- 72 GT Ute |
Posted By: californiajohnny
Date Posted: 05-May-2019 at 9:22AM
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if you have the old one compare them to see if the rod is the same distance from the pivot point to the float can affect the ratio and the distance it has to travel up and down from F to E, may just need bent? also check that the float isn't hitting the pick tube or something, limiting it movement??? ------------- 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 |
Posted By: Big Bird
Date Posted: 05-May-2019 at 1:22PM
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Is the sender for the same size tank? ------------- "What we do in full frontal view, is more honest than your cleaned-up mind." Randy 1979 T-Bird 2005 F-150 STX RCSB 4.6, 3.55 LSD How the Heck does a REGULAR CAB SHORTBED weigh over 5200 pounds? |
Posted By: bellj
Date Posted: 06-May-2019 at 3:31AM
| Before I installed the new sender in the tank. I compared the original one to the new one. They are identical. I would prefer not to bend anything. I may be off a bit, but bending the float arm seems to be a band aid approach to fixing the problem. What I really want to do is adjust the fuel gauge to match the new sender. Does anyone know what the 2 adjustments in the fuel gauge do? |
Posted By: Rockatansky
Date Posted: 06-May-2019 at 12:27PM
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never heard of any adjustments on the gauge did you happen to ohm the rheostats in each sender before you installed the new one? bending the float arm is no big deal, it's the only way to correlate the bottom and top of the tank with the throw of the sender. if it seems like a band-aid approach, all it needs is a band-aid ------------- 72 GT Ute |
Posted By: hogfiddles
Date Posted: 06-May-2019 at 12:39PM
Exactly right---- it doesn't take much of a bend to change it, either ------------- 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) |
Rockatansky wrote:Posted By: californiajohnny
Date Posted: 06-May-2019 at 2:35PM
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never noticed if the fuel gauge had those adjustments? but the water temps do, i contemplated adjusting the sport temp as it read high but i just put my std temp gauge in it yes resistance value is very important when it comes to fuel gauges! mainly when swapping to aftermarket fuel gauges as they are a different resistance range when using the stock sender....probably not the case here but just a thought ------------- 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 |