It's the ground stupid!
The thread title pretty much sums up my knowledge of Corvette electrical problems, so I probably know part of my question. My gas tank was just topped off with good old 106 racing fuel after sitting all winter with half a tank. Out on the road the gauge stayed on half most of the time, but sometimes went to full and stayed for awhile before coming back to register half full. In all of my 62's with similar problems I simply added a new ground wire to the sending unit and all was well. Does my problem with my 64 FI coupe sound like a ground issue and if so, how do I fix it? The mid year coupes don't have easy access to the gas tanks like my 62's did.
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Re: It's the ground stupid!
Willard -
The midyear fuel gauge system circuit design is completely different than the C1 system; the link below will take you to a diagnostic article for the midyear system that should be helpful.
http://www.lbfun.com/warehouse/tech_...rFuelGauge.pdf -
Re: It's the ground stupid!
John-Thanks for the excellent article. Once our short driving season here in Maine is over I plan to troubleshoot the issue. Thanks again.Comment
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Re: It's the ground stupid!
Willard;
When your short driving season ends, ours will just be getting going. We hibernate during the hot/wet season here in Central Florida - well we do if we don't want to drive our old Vettes in a downpour.
On the gas gauge, my 63 has done that same dance for years, but I don't get too worried about it. I always figured that was why Chevy gave us such big gas fillers to look through. Then too, I cut my teeth on a 50 Chevy Coupe that I put a V8 in around 1956, and to make a 6 volt gauge work on 12 volts we simply put a toggle switch in the line to take a quick level check.
I'll check out the article though so I can correct it some day.
Stu FoxComment
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