Tachometer

Reply Subscribe

Thread Tools

Search this Thread

Jan 3, 2016 | 03:53 PM

quiksilver50

Thread Starter

Heel & Toe

Joined: May 2014

Posts: 24

Likes: 2

From: Oklahoma City

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?

Jan 3, 2016 | 04:15 PM

toobroketoretire

Melting Slicks

Joined: Apr 2009

Posts: 2,632

Likes: 112

From: Great Plains Iowa

Quote:

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.

Jan 3, 2016 | 04:21 PM

quiksilver50

Thread Starter

Heel & Toe

Joined: May 2014

Posts: 24

Likes: 2

From: Oklahoma City

HA ! I have the original 350 she was born with, it is the most babied motor around,never pegged it to be sure.

Jan 3, 2016 | 05:04 PM

Alan 71

Team Owner

Joined: Sep 2006

Posts: 31,173

Likes: 4,250

From: Westminster Maryland

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.

Jan 3, 2016 | 05:07 PM

quiksilver50

Thread Starter

Heel & Toe

Joined: May 2014

Posts: 24

Likes: 2

From: Oklahoma City

sorry about that.It is a '78,with automatic ( replaced the 350 auto with a 700R4 )

Jan 3, 2016 | 05:27 PM

Alan 71

Team Owner

Joined: Sep 2006

Posts: 31,173

Likes: 4,250

From: Westminster Maryland

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

Jan 3, 2016 | 05:29 PM

quiksilver50

Thread Starter

Heel & Toe

Joined: May 2014

Posts: 24

Likes: 2

From: Oklahoma City

Quote:

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

Jan 3, 2016 | 06:31 PM

C3 4ME

Le Mans Master

Joined: Oct 2005

Posts: 6,247

Likes: 471

From: Glen Allen, VA

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.

Corvette Stories

The Best of Corvette for Corvette Enthusiasts

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Joe Kucinski

8 Coolest Corvette Pace Cars (and Replicas) of All Time

Verdad Gallardo

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Joe Kucinski

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Verdad Gallardo

Top 10 Corvettes Coming to Mecum Indy 2026!

Brett Foote

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Michael S. Palmer

10 Revolutionary 'Corvette Firsts' Most People Don't Know

Joe Kucinski

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Michael S. Palmer

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Joe Kucinski

10 Most Common Corvette Problems of the Last 20 Years!

Joe Kucinski

Jan 3, 2016 | 06:54 PM

quiksilver50

Thread Starter

Heel & Toe

Joined: May 2014

Posts: 24

Likes: 2

From: Oklahoma City

Quote:

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

Jan 3, 2016 | 07:34 PM

#10

0Willcox Corvette

Former Vendor

Joined: Aug 2006

Posts: 76,656

Likes: 1,850

From: Jeffersonville Indiana 812-288-7103

St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15

Quote:

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

Jan 3, 2016 | 08:12 PM

#11

quiksilver50

Thread Starter

Heel & Toe

Joined: May 2014

Posts: 24

Likes: 2

From: Oklahoma City

Quote:

Originally Posted by Willcox Corvette

-Willcox

Thank you!

Jan 6, 2016 | 09:09 AM

#12

rklessdriver

Safety Car

Joined: Apr 2005

Posts: 3,624

Likes: 431

From: Dale City VA

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.