C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

jumpy electric tach

Thread Tools
 
Search this Thread
 
Old Feb 4, 2013 | 06:53 AM
  #1  
dembo's Avatar
dembo
Thread Starter
Burning Brakes
10 Year Member
 
Joined: May 2007
Posts: 1,022
Likes: 33
From: Lokeren, Belgium
Default jumpy electric tach

Gentlemen, is their any reason other then the tach at the end of it's lifespan to make it jump like this? The tach filter is new as well is the distributor. The wires are even shielded. (it's a 74 with a 75 electric tach)
Thanks,
Nick
Reply
Old Feb 4, 2013 | 07:23 AM
  #2  
Garys 68's Avatar
Garys 68
Melting Slicks
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Sep 2004
Posts: 2,655
Likes: 19
Default

Bad ignition secindary (plugs, wires, distributor cap) can cause the tach to flutter.
Reply
Old Feb 4, 2013 | 03:06 PM
  #3  
dembo's Avatar
dembo
Thread Starter
Burning Brakes
10 Year Member
 
Joined: May 2007
Posts: 1,022
Likes: 33
From: Lokeren, Belgium
Default

Thanks for thinking along Gary. All those items have about 300 miles on them but you never know. I'll try a different cap when I'm at the local speedshop.
Is there any way to test the tach when it's in the car?
Nick
Reply

Get notified of new replies

To jumpy electric tach





All times are GMT -4. The time now is 07:56 AM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE