Fuel gauge needle bouncing

Hi everyone,

I'm in the midst of diagnosing two fuel gauge problems. Originally it would only read half full after filling up.

After replacing it with a recalibrated gauge, now the needle bounces like crazy all over the place when the car is moving.

I'm assuming there's some sort of chafed ground somewhere - the tank and sender are brand new, sender was bench-tested. The fuel gauge is also recalibrated.

Any ideas on places to look very closely?

Thanks!

0 members like this

▶ Reply to This

Replies to This Discussion

Permalink Reply by Dennis P. DiBari on March 20, 2026 at 4:05pm

Hi Ken,

How about the ground wire off the gauge, that runs to the rear of the car with a bolt on the rear frame. It is near/under the license plater cover. Make sure it is cleaned and tight. Take a look at it.

Dennis DiBari ,NY

▶ Reply

Permalink Reply by Kenneth Barton on March 20, 2026 at 4:31pm

I was so confident that wasn’t it…until I looked closer and realized the screw wasn’t holding the ground tight to the metal. I switched to a traditional nut and bolt and bam! Rock steady.

Thanks Dennis!

▶ Reply

Permalink Reply by Dennis P. DiBari on March 20, 2026 at 7:25pm

Hi Ken,

Very glad that it worked for you. That is usually the culprit - good work on your part that you fixed it!

Dennis DiBari

▶ Reply

RSS

Welcome to
63/64 Cadillac Website

Sign Up
or Sign In

Or sign in with:

Photos

Forum

Vendor to refurbish my electrical antenna

Started by Remco Waller in 1963/64 Cadillac Specific Discussion. Last reply by Rob Nance 34 minutes ago. 2 Replies 0 Likes

Hi, I own a 1964 Eldorado and the electrical antenna is no longer working smoothly and get sometimes stuck so like to refurbish it; who can help with a good vendor to do this.Remco WallerContinue

How to keep my soft top in good condition?

Started by Remco Waller in 1963/64 Cadillac Specific Discussion 17 hours ago. 0 Replies 0 Likes

Hi, I own a 1964 Eldorado convertible since last August and would love to get some input what the best way is to keep my soft top in good conditions.Which materials to use to clean / preserve the…Continue

No Privacy... Even on the Moon!

Started by Jason Edge in General Discussion. Last reply by Dennis P. DiBari on Tuesday. 1 Reply 0 Likes

You will never guess what the Artemis II Orion spacecraft crew found parked on the back side of the Moon yesterday - DINO! And I thought I had found the perfect private parking spot!…Continue

Clock Repair

Started by Michael Vogler in General Discussion. Last reply by Dennis P. DiBari Mar 22. 6 Replies 1 Like

63/63 Owners,The clock in my '64 just went out. It appears that the mechanical component is working properly, so I think the coil has failed. I contacted Jerry at Clockworks and he advised that he…Continue

Blog Posts

1963 RHS A/C kick panel - photos needed

Posted by SK on June 2, 2025 at 2:20pm 2 Comments 0 Likes

Could someone post front and back photos of the 1963 right-hand kick panel with A/C?

My car didn’t come with the original kick panels, so it's a bit of a mystery to me how I should cut the backing board and carpet to fit around the A/C.

Many thanks,

-Samu

'63 Tailfin Tales

Posted by Mark Mata on February 22, 2025 at 5:00pm 9 Comments 0 Likes

Continue

New old stock seat material

Posted by Ray Schick on August 22, 2024 at 6:25pm 2 Comments 0 Likes

I bought this seat material thinking that it’s…

Continue

Loud air moving sound within carb with cleaner removed

Posted by Dave Fehrle on March 23, 2024 at 3:23pm 8 Comments 1 Like

While checking my Carter carb with engine running, I took the air cleaner off and there was a very loud hissing sound of air. I placed a piece of paper over the carb and it didn’t move up or down, is this normal?