Fuel gauge accuracy
Thread Starter
Racer
Joined: May 2011
Posts: 431
Likes: 0
From: Willoughby Hills OH
Fuel gauge accuracy
Just got my 78 vette. I read it has a 23.7 gallon tank.
But I am not use to the floppy gauge. How do I really know how much fuel I have? Just go by mileage or something? Any ways to convert the anything to make it more accurate?
But I am not use to the floppy gauge. How do I really know how much fuel I have? Just go by mileage or something? Any ways to convert the anything to make it more accurate?
Thread Starter
Racer
Joined: May 2011
Posts: 431
Likes: 0
From: Willoughby Hills OH
so it should be 100% accurate like newer cars? What do I replace to fix this then?
I thought it is because the gas bobs around in the tank and older cars couldnt quite tell how full it is.
I suppose it should be accurate if i am not moving and am on level surfaces.
I thought it is because the gas bobs around in the tank and older cars couldnt quite tell how full it is.
I suppose it should be accurate if i am not moving and am on level surfaces.
Racer
Joined: Mar 2001
Posts: 272
Likes: 3
From: Marion Ia
It will move around some up hill, down hill, acceleation and breaking. But should not keep moving all the time. I'm not sure about the tank on a 78 I know some have bladders my 73 does not so it was realtivly easy. Best bet is to get an AIM from one of the vendors it will show all the parts and how they go togeather.
Thread Starter
Racer
Joined: May 2011
Posts: 431
Likes: 0
From: Willoughby Hills OH
I will have to look when i joy ride tonight. I think it still bounces around even if i am sitting still.
I will try to get my passenger to record a video of it to show you experts.
I will try to get my passenger to record a video of it to show you experts.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
If the needle bounces, there is a poor connection between the sender and the gauge. It could be a wire about to break at the sender, a fatigue failure of the wire inside the insulation...anywhere on the way to the gauge, a loose connection on the backside of the gauge. It could even be a poor connection between the body of the temp sensor and the cylinder head. That is meant to be the ground connection for the fuel gauge system. If there is thread sealant or teflon tape on the sender threads, it could be limiting the ground connection and causing the intermittant bounce you are seeing.
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Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Here's a thread that talks about the dampening built into the gauge. If your gauge is flicking very fast the dampening effect is gone.
I did a little testing using a gauge with good dampening,making and breaking the connection would not make the needle flick,it would only move slowly.
http://forums.corvetteforum.com/c3-t...e-bounces.html
I did a little testing using a gauge with good dampening,making and breaking the connection would not make the needle flick,it would only move slowly.
http://forums.corvetteforum.com/c3-t...e-bounces.html
Thread Starter
Racer
Joined: May 2011
Posts: 431
Likes: 0
From: Willoughby Hills OH
thanks guys. here is a video i had my passenger record. I was going around 30 mph or so on flat-ish land.
I believe I have about just under 3/4 tank of gas.
watch the video and let me know if it is bouncing too much, its not the best quality but its the upper right gauge in case you didnt know.
thanks
http://www.youtube.com/watch?v=fLFP7ZTs8RI
I believe I have about just under 3/4 tank of gas.
watch the video and let me know if it is bouncing too much, its not the best quality but its the upper right gauge in case you didnt know.
thanks
http://www.youtube.com/watch?v=fLFP7ZTs8RI
