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

Cruise control question ...

Thread Tools
 
Search this Thread
 
Old Jun 1, 2009 | 02:39 PM
  #1  
grandpepere's Avatar
grandpepere
Thread Starter
2nd Gear
 
Joined: Jun 2009
Posts: 2
Likes: 0
Default Cruise control question ...

Hello all,
'78 Silver Anniversary model; I can't set the cruise until I am doing at least 65mph, then the car accelerates to 75. How do I change it to stay at 65?
Thank you.
Reply
Old Jun 1, 2009 | 03:35 PM
  #2  
wombvette's Avatar
wombvette
Le Mans Master
15 Year Member
 
Joined: Jan 2000
Posts: 8,918
Likes: 27
From: New Hill NC
Default

The cruise transducer is bad.
Reply
Old Jun 1, 2009 | 05:40 PM
  #3  
grandmastercorvette's Avatar
0grandmastercorvette
Former Vendor
 
Joined: Apr 2009
Posts: 766
Likes: 3
From: Charlotte North Carolina 704-394-5150
Default

It can be adjusted if the speed inceases from the speed it was set at, but if it only can be set when you are going 65 mph, I have to agree it is bad or that you may have vacuum leaks in the hoses. Does it dis-engage when you apply the brakes?
It should be able to engage at 50mph. Keep us informed. "DUB"
Reply
Old Jun 2, 2009 | 08:15 AM
  #4  
grandpepere's Avatar
grandpepere
Thread Starter
2nd Gear
 
Joined: Jun 2009
Posts: 2
Likes: 0
Default

I have to try several times to get it to engage, but I can engage it at speeds in excess of 60mph.
Reply
Old Jun 2, 2009 | 08:30 AM
  #5  
7T1vette's Avatar
7T1vette
Team Owner
15 Year Member
Community Builder
Community Influencer
Top Answer: 5
 
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Default

Either the control head is malfunctioning or the engagement switch is intermittant. You can check the switch by removing the switch cable connector from its socket [the three wire cable/connector at the base of the steering column/dash panel] and checking continuity for all switch conditions. If the switch is working properly, your problem [most likely] is the control head. If you are 'mechanically inclined', pull the control head and carefully disassemble it. It may be dirty (internal orifices/friction wheel) or damaged. If you don't spot any significant damage, clean it up, reassemble and install it; then try it again. {P.S. You may find something obviously wrong as you work through this problem.} Note: Since it works at all...at 60 mph...the system is probably 'functional'. Your problem may be easily solved.
Reply

Get notified of new replies

To Cruise control question ...





All times are GMT -4. The time now is 02:24 PM.

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