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Posted: April 25 2008 10:02 AM
 
Tommy CHOO CHOO (aka TYCHOOCHOO) [ View ] [ tychoochoo@optonline.net ] [ Car Ads ] [ Blogs ]
MT. SINAI, New York
(631) 476-8881
 Tommy choo choo
 
I have Classic Gauges in the 34. I have a problem with the fuel gauge. When the tank is full it registers 3/4 until I put my foot on the brake, then it goes down about 1/8th and back up again after I release the brake. When the car is shut down the gauge pointer goes way below the empty mark. Has anyone had this problem? I spoke to a tech at classic and he said the sending unit not adjusted right. I spoke to another tech awhile back and he said it's a grounding problem. What gives?
 
 
Comments
 
Posted by Blown34inAK  -  04/25/2008 02:09 PM
Sounds like a ground problem. You could run a jumper wire from the sending unit to a good known ground to test. Is the sending unit sharing the same ground point as the rear lights?
Blown34inAK [ View ] [ Email ] [ Blogs ] [ Car Ads ] Sitka, Alaska
 
Posted by hotrodgene  -  04/25/2008 06:35 PM
are you sure there are baffles inside tank to provent fuel from moving around
Gene Riffe [ View ] [ Email ] [ Blogs ] [ Car Ads ] Saint Petersburg, Florida
 
Posted by DavyJ  -  04/25/2008 06:57 PM
if this happens when the car is running and the charging system is working, then there must be a change in the voltage feed to the gauge. If the brake light switch is drawing power from the same feed as the gauges it will change the voltage to the gauge which will make it give a different reading. The same theory applies to the ground side of the gauge and the sending unit. Check the ground and the feed to make sure they are not tied together for the circuits.
Still driving the wife's car, cause I am slow. [ View ] [ Email ] [ Blogs ] [ Car Ads ] Niagara Falls, Canada Charter Member since February 2005
 
Posted by cutitup  -  04/25/2008 09:41 PM
i had a very simular problem i ran all my gauges to one ground classic told me the speeddometer had to be on a sepsrte groud and that fixed it
cutitup [ View ] [ Email ] [ Blogs ] [ Car Ads ] lincoln, Delaware
 
Posted by TYCHOOCHOO  -  04/26/2008 08:58 AM
Gene

Not sure if there are baffles inside the tank. Can't see the wires above the tank. I was looking for a fix without taking the tank down but I guess I'm going to take it down to get to the bottom of this. Thanks guys I will let you know how I make out. Tommy
Tommy choo choo [ View ] [ Email ] [ Blogs ] [ Car Ads ] MT. SINAI, New York Charter Member since June 2007
 
Posted by jimmothershead  -  04/26/2008 09:54 AM
1929 Ford A Roadster
Jim [ View ] [ Email ] [ Blogs ] [ Car Ads ] Huntingtown, Maryland
 
Posted by cr55  -  04/26/2008 11:26 AM
1929 Ford A Sedan
I thought that I knew it all , but.. [ View ] [ Email ] [ Blogs ] [ Car Ads ] dover, Delaware
 
Posted by ol bear  -  04/26/2008 03:57 PM
tommy id use 14 gauge jumper wires with the gauge wiring in the harness disc. to prove what the problem is ,, ol bear yellow is the send and white is ground ,, dont use the ground from the gauge lts for ur ground ,,any other problems talk to cr55 and get some windex ,, call me ill walk ya through it ,,
OL BEAR [ View ] [ Email ] [ Blogs ] [ Car Ads ] crown point, Indiana
 
Posted by scooting  -  04/26/2008 06:25 PM
Your car is a quirk of nature. Hybrids store energy and save gas when you brake. You have an anti-hybrid, it does better full throttle. Drive on.
scooting [ View ] [ Email ] [ Blogs ] [ Car Ads ] Elkridge, Maryland
 
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