Gas gauge issue.
Thread Starter
Instructor
Joined: Jul 2004
Posts: 194
Likes: 0
From: St.Louis Missouri
Gas gauge issue.
I just bought this 78 and have noticed the gas gauge flops around like a fish out of water.(unless i'm not moving) This is my first C3 and I would like to here from you guys if this is normal??????
Safety Car
Joined: Dec 2004
Posts: 4,876
Likes: 1
From: Jersey Shore Exit 98
Originally Posted by kona
Nope it's not normal. I would check all my connections but I suspect you are having issues with the sending unit.
Kona
Kona
not normal, either a bad ground or the sending unit went south.
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
My 77 does it, too. I know it's not the gauge ground, so it has to be a sending unit problem. I'll get around to fixing it one of these days. My "low fuel" light never goes off, either. A forum member kindly provided the instructions to build an adjustable circuit to rectify that (which I also haven't done).
Heel & Toe
Joined: Aug 2005
Posts: 16
Likes: 0
If all the connections and sending unit are good, the gauge is bad. We went through the same problem on our '81 vette.
The gauge also acts as damper for the motion of the float on the sending unit. When the gauge wears out, the needle will follow the motion of the float on the sending unit instead of staying steady. You'll notice when you first get in the car the needle is still. Once you set the car in motion the needle starts jumping around.
We bought a new gauge from Zip for $59 April 2005
Part#-D-323 / 78-82 Fuel Gauge / *H20208*
It is a AC Delco / GM Restoration Parts product. That cured the twitchy needle syndrome. Even the low fuel light comes on now.
Good luck!
Michele
The gauge also acts as damper for the motion of the float on the sending unit. When the gauge wears out, the needle will follow the motion of the float on the sending unit instead of staying steady. You'll notice when you first get in the car the needle is still. Once you set the car in motion the needle starts jumping around.
We bought a new gauge from Zip for $59 April 2005
Part#-D-323 / 78-82 Fuel Gauge / *H20208*
It is a AC Delco / GM Restoration Parts product. That cured the twitchy needle syndrome. Even the low fuel light comes on now.
Good luck!
Michele
