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 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 07-22-2006, 11:53 PM   #1
matthufham
Registered User
 
Join Date: Feb 2005
Location: Carl Junction, Missouri
Posts: 2,061
Calling Gmcpaul!

i bought the poly blazer tank for my truck last year and i'm finally to the point of driving it and i have a problem with my gauge. i have ran the sending unit wire to my idiot light fuel gauge and then i got a performance fuel gauge and moved it to there, and both wouldn't work correctly. for the aftermarket gauge i ran the wire from the gauge directly to the tank, no fuse panel needed they said. the gauge has power and is grounded, and the sending unit is grounded. now the tank has around 15 gallons so that's about 3/4 i would think.when you turn the key, the gauge needle moves an 1/8th inch, and not even past the E for empty (because with the key off, the gauge needle goes far below E).

i think i've narrowed the problem to the sending unit. is it a 0-90 ohm sending unit? the gauge i bought was for the standard GM 0-90 ohm one. if it is then i guess the float is stuck inside the tank and would need to remove it.

thanks a bunch,
matt hufham
matthufham is offline   Reply With Quote
Old 07-23-2006, 12:21 AM   #2
VetteVet
Msgt USAF Ret

 
VetteVet's Avatar
 
Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,715
Re: Calling Gmcpaul!

this may help.
http://www.6066gmcguy.org/Electrical-02.htm
__________________
VetteVet

metallic green 67 stepside
74 corvette convertible
1965 Harley sportster
1995 Harley wide glide

Growing old is hell, but it beats the alternative.
VetteVet is offline   Reply With Quote
Old 07-24-2006, 11:21 AM   #3
matthufham
Registered User
 
Join Date: Feb 2005
Location: Carl Junction, Missouri
Posts: 2,061
Re: Calling Gmcpaul!

i did a test yesterday, disconnected the wire to the gauge that goes to the sending unit, turn the key to run. if the gauge pegs out over full, then the gauge is fine, it's the sending unit, which is what it did. i need to drive off about 14 gallons of gas before dropping the tank.
matthufham is offline   Reply With Quote
Old 07-24-2006, 01:07 PM   #4
VetteVet
Msgt USAF Ret

 
VetteVet's Avatar
 
Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,715
Re: Calling Gmcpaul!

I'm curious if the website helped you at all? VV
__________________
VetteVet

metallic green 67 stepside
74 corvette convertible
1965 Harley sportster
1995 Harley wide glide

Growing old is hell, but it beats the alternative.
VetteVet is offline   Reply With Quote
Old 07-24-2006, 01:33 PM   #5
matthufham
Registered User
 
Join Date: Feb 2005
Location: Carl Junction, Missouri
Posts: 2,061
Re: Calling Gmcpaul!

yea, this website. someone else did this in a recent topic and i tried it out aswell.
matthufham is offline   Reply With Quote
Old 07-25-2006, 06:18 AM   #6
GMCPaul
Senior Member
 
Join Date: Mar 2000
Location: Rockville,In. USA
Posts: 3,721
Re: Calling Gmcpaul!

Matt the sender is a 0-90 Ohm. Check to make sure float is solid and empty, sometimes the solder ring that connects the 2 halves are damaged during installation or handling creating a small gap in solder joint that allows fuel in, normally in this case though the gauge works fine at first and slowly quits working as float fills. Shoot me a email at robbinspd1199@yahoo.com to update me once you find the problem. A friend emailed us a link to this post as I had missed your posting it.
GMCPaul
GMCPaul is offline   Reply With Quote
Old 07-26-2006, 07:08 PM   #7
matthufham
Registered User
 
Join Date: Feb 2005
Location: Carl Junction, Missouri
Posts: 2,061
Re: Calling Gmcpaul!

ok i got the tank down, got the float out, and i found many hairline cracks. i bought a gas tank repair kit, basically JB weld with a fiberglass cloth.







it has to cure 6 hours, so tomorrow i'll be putting the sending unit back in and tank in
matthufham 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 03:17 PM.


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