Fuel gauge issue
Thread Starter
1st Gear
Joined: Jul 2015
Posts: 1
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Fuel gauge issue
Just finished full restoration of '76. Took on first road trip and ran out of fuel with gauge just past 1/4 tank. When I fill tank needle goes past Full mark. Removed ground on top of tank after viewing tech videos and it goes even further past Full. Assistance appreciated.
Melting Slicks
Joined: Apr 2009
Posts: 2,632
Likes: 112
From: Great Plains Iowa
Just finished full restoration of '76. Took on first road trip and ran out of fuel with gauge just past 1/4 tank. When I fill tank needle goes past Full mark. Removed ground on top of tank after viewing tech videos and it goes even further past Full. Assistance appreciated.
Its an easy fix.................just bend the float arm up so the gauge reads EMPTY with about 5 gallons remaining in the tank. My '71 shows EMPTY when there is still 7 gallons in the tank (which is a nice "cushion" to have) and it reads exactly FULL when the tank is full.
Instructor
Joined: Sep 2009
Posts: 135
Likes: 2
From: Waterbury CT.
Just finished full restoration of '76. Took on first road trip and ran out of fuel with gauge just past 1/4 tank. When I fill tank needle goes past Full mark. Removed ground on top of tank after viewing tech videos and it goes even further past Full. Assistance appreciated.
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,851
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
It sounds like the issue is the sending unit. Could be a bent arm, or it could be the float is defective. Either way, SSG26k has given you the info you need.
While the scale is 0-90 with 90 being full, some senders will read even higher than 90 and more often than not 45 ohms will not be exactly 1/2 a tank but it'll be close.
Test the sender and see what the outputs are...
If you tested the dash unit with the grounded/open circuit test then the gauge should be fine.
Willcox
While the scale is 0-90 with 90 being full, some senders will read even higher than 90 and more often than not 45 ohms will not be exactly 1/2 a tank but it'll be close.
Test the sender and see what the outputs are...
If you tested the dash unit with the grounded/open circuit test then the gauge should be fine.
Willcox
