The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 09-15-2012, 01:34 AM   #1
'79squared
Registered User
 
'79squared's Avatar
 
Join Date: Feb 2012
Location: Camas WA
Posts: 175
Fuel gauge question

OK so when I took out my gauge cluster to clean it all up and paint the needles, I think I moved the gas needle a little bit. So tonight I went and filled the tank full and thinking the needle would be off I was trying to push it back to full to make it right but it just kept going over the full mark. WEW windy I know lol. So my question is......well the fuel gauge auto set it self or is it totally jacked now? Im going on a long drive and dont really know where to trust the gauge is at haha
__________________
1979 SWB 350/350
'79squared is offline   Reply With Quote
Old 09-15-2012, 09:25 AM   #2
J Knight
Registered User
 
J Knight's Avatar
 
Join Date: Jun 2011
Location: Baytown TX
Posts: 2,219
Re: Fuel gauge question

I don't know if its jacked or not but it woundnt hurt to carry a 3 or 5 gallon gas can in the back till you find out where needle sits on empty.
Posted via Mobile Device
__________________
John
82 Chevy Silverado 350ci/TH350
J Knight is offline   Reply With Quote
Old 09-15-2012, 09:36 AM   #3
'79squared
Registered User
 
'79squared's Avatar
 
Join Date: Feb 2012
Location: Camas WA
Posts: 175
Re: Fuel gauge question

HAHA ya that was my thought. Well Im road trippin today so maybe we find out :-)
__________________
1979 SWB 350/350
'79squared is offline   Reply With Quote
Old 09-15-2012, 11:16 AM   #4
hatzie
Moderator
 
hatzie's Avatar
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,975
Re: Fuel gauge question

Use a few 2 or 3watt wire wound resistors or a decade box and a 12v battery or 14v DC power supply to bench test/re-calibrate the gauge.

The values come from my bench tests using a bench top DC power supply set to 14.5vdc (Delco alternator regulator voltage), a General Radio 1432 decade resistance box, and several 76-91 fuel gauges. The gauges all read the same with a tolerance of plus or minus 2 ohms.

Ώ, Gauge Reads
90, F
76, 7/8
64, 3/4
53, 5/8
45, 1/2
37, 3/8
29, 1/4
18, 1/8
00, E

Gauge contacts are arranged as follows

...........GND...........

12v IGN.......SENDER
__________________
1959 M35A2 LDT465-1D SOLD
1967 Dodge W200 B383, NP420/NP201 SOLD
1969 Dodge Polara 500 B383, A833 SOLD
1972 Ford F250 FE390, NP435/NP205 SOLD
1976 Chevy K20, 6.5L, NV4500/NP208 SOLD
1986 M1008 CUCV SOLD
2000 GMC C2500, TD6.5L, NV4500
2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263
2009 Impala SS LS4 V8


RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.
hatzie is online now   Reply With Quote
Old 09-15-2012, 09:36 PM   #5
'79squared
Registered User
 
'79squared's Avatar
 
Join Date: Feb 2012
Location: Camas WA
Posts: 175
Re: Fuel gauge question

Well easier yet. I just drove 400 miles today and with all the pushing around the needle I did I can tell you that it did set its self. I filled it over full and drove it till the needle hit E before gassing up. So it reads just fine. Thanks all for the responses.
__________________
1979 SWB 350/350
'79squared is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 06:58 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com