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Old Jan 3, 2016 | 03:53 PM
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Default Tachometer

Went for a drive this morning, and saw my tach pegged all the way over and would not correct itself, what would cause that?
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Old Jan 3, 2016 | 04:15 PM
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Originally Posted by quiksilver50
Went for a drive this morning, and saw my tach pegged all the way over and would not correct itself, what would cause that?

You can stop that by taking your foot off the gas pedal.
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Old Jan 3, 2016 | 04:21 PM
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HA ! I have the original 350 she was born with, it is the most babied motor around,never pegged it to be sure.
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Old Jan 3, 2016 | 05:04 PM
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Hi q,
No information in your post or in your profile about what YEAR you're car is.
Knowing that would be help and a start since we'd then at least know if it's a mechanical or electronic tachometer.
Regards,
Alan

Last edited by Alan 71; Jan 3, 2016 at 05:07 PM.
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Old Jan 3, 2016 | 05:07 PM
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sorry about that.It is a '78,with automatic ( replaced the 350 auto with a 700R4 )
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Old Jan 3, 2016 | 05:27 PM
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Hi q,
Sorry, I can really only help with earlier mechanical tachometers…. and even then just a little bit.
Someone else will be along.
Regards,
Alan
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Old Jan 3, 2016 | 05:29 PM
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Originally Posted by Alan 71
Hi q,
Sorry, I can really only help with earlier mechanical tachometers…. and even then just a little bit.
Someone else will be along.
Regards,
Alan
thanks for asking tho
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Old Jan 3, 2016 | 06:31 PM
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Not sure what would cause it, but Willcox has been very helpful here with the electronic tachs. I'd email them and see if they could offer any advice.
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Old Jan 3, 2016 | 06:54 PM
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Originally Posted by C3 4ME
Not sure what would cause it, but Willcox has been very helpful here with the electronic tachs. I'd email them and see if they could offer any advice.
Ok,thank you
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Old Jan 3, 2016 | 07:34 PM
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Originally Posted by quiksilver50
Went for a drive this morning, and saw my tach pegged all the way over and would not correct itself, what would cause that?
In most cases the issue you describe tends to be a failure in the tach board. Removal on your car is easy and testing is even easier.

The info below will walk you through how to test and remove the tach from your car.


1978-1982 Corvette Tachometer Testing, Removal, Board Installation


If you do need a new tach board, we have plenty of them.

https://willcoxcorvette.com/corvette...78-79-usa-made

If you purchase a new board, you'll need to know how to install it.

Corvette Tachometer Board Installation Instructions 1978-1982
http://willcoxcorvette.com/repairand...lp.php?hID=252

Happy New Year

-Willcox
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Old Jan 3, 2016 | 08:12 PM
  #11  
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Originally Posted by Willcox Corvette
In most cases the issue you describe tends to be a failure in the tach board. Removal on your car is easy and testing is even easier.

The info below will walk you through how to test and remove the tach from your car.


1978-1982 Corvette Tachometer Testing, Removal, Board Installation


If you do need a new tach board, we have plenty of them.

https://willcoxcorvette.com/corvette...78-79-usa-made

If you purchase a new board, you'll need to know how to install it.

Corvette Tachometer Board Installation Instructions 1978-1982
http://willcoxcorvette.com/repairand...lp.php?hID=252

Happy New Year

-Willcox
Thank you!
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Old Jan 6, 2016 | 09:09 AM
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Very easy to replace the board.

Same thing happened to my wife's 79 few yrs ago. Used Wilcox's trouble shooting guide and bought a new board from Wilcox. Came in a few days and I had it fixed in about 25mins.
Will

Last edited by rklessdriver; Jan 6, 2016 at 09:09 AM.
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Old Jan 6, 2016 | 10:55 AM
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Originally Posted by rklessdriver
Very easy to replace the board.

Same thing happened to my wife's 79 few yrs ago. Used Wilcox's trouble shooting guide and bought a new board from Wilcox. Came in a few days and I had it fixed in about 25mins.
Will
You 78-82 guys have it made, the 75-77 tach is a beast to remove.
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