Help with a fuel gauge
Thread Starter
Racer
Joined: Jan 2006
Posts: 254
Likes: 0
From: Tomball Texas
St. Jude Donor '07
Help with a fuel gauge
I have an 85 & the fuel gauge went to full & stayed there. Could it be a sending unit, how difficult to repair or should I take her to the mechanic?
Thanks in advance!
Thanks in advance!
Melting Slicks
Joined: Mar 1999
Posts: 2,830
Likes: 20
From: Las Vegas Nevada
Not a bad job at all. Remove the plate that the fuel fill door mounts to (the black piece that has the small hole where you can put the gas cap while filling) and pull the rubber boot out that surrounds the fuel fill neck and the fuel pump/fuel level sending unit is readily accessible.
I would consider picking up a factory service manual either from http://www.helminc.com/ or E-bay. You will pay the price of the manual to have the gauge fixed at a shop, and if you do it yourself you will have the book for further use.
The fuel gauge sending unit is a pretty simple system and is easily diagnosed with the manual. It will tell you how to diagnose a always full situation. I am pretty sure that GM sending units measure 0 to 90 ohms, full to empty. I am not sure which is which, it sounds like the wire that sends signal from the sending unit to the gauge is either grounded or open.
Again, with the factory manual it is simple to diagnose.
hope this helps,
I would consider picking up a factory service manual either from http://www.helminc.com/ or E-bay. You will pay the price of the manual to have the gauge fixed at a shop, and if you do it yourself you will have the book for further use.
The fuel gauge sending unit is a pretty simple system and is easily diagnosed with the manual. It will tell you how to diagnose a always full situation. I am pretty sure that GM sending units measure 0 to 90 ohms, full to empty. I am not sure which is which, it sounds like the wire that sends signal from the sending unit to the gauge is either grounded or open.
Again, with the factory manual it is simple to diagnose.
hope this helps,
Safety Car
Joined: Jul 2004
Posts: 3,845
Likes: 30
Originally Posted by elwood blooz
I have an 85 & the fuel gauge went to full & stayed there. Could it be a sending unit, how difficult to repair or should I take her to the mechanic?
Thanks in advance!
Thanks in advance!
