1984 Corvette Cruise Control quits when warm - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Chevrolet When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Reply
 
 
 
Thread Tools Search this Thread
Old 06-18-2011, 07:08 PM   #1
Junior Member
Thread Starter
 
Join Date: Jun 2011
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
dmthornt is on a distinguished road
Unhappy 1984 Corvette Cruise Control quits when warm

I have a 1984 Corvette that I've rebuilt and I'm working on the cruise control. When you first start driving the cruise control works fine, but after about 15 minutes of driving at highway speeds, it quits working. The 700R4 transmission was rebuilt and the speedometer always works fine. The turn signal lever is new and all the voltages work. I just installed a rebuilt cruise control servo assembly. Almost all of the vacuum lines are new and after it quit working today, I removed the brake sensor vacuum line at the servo and capped it. It still did not work while the car was warm.
dmthornt is offline   Reply With Quote
Old 06-18-2011, 08:08 PM   #2
-- SITE DONATOR --
True Car Nut
 
ymmot04's Avatar
 
Join Date: May 2009
Posts: 4,638
Thanked 5 Times in 4 Posts
ymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of light
Default

Thread moved into appropriate section for better visibility.
ymmot04 is offline   Reply With Quote
Old 06-18-2011, 11:39 PM   #3
Senior Member

True Car Nut
 
sseidriver97's Avatar
 
Join Date: Mar 2010
Location: Portage mi
Posts: 7,124
Thanked 3 Times in 3 Posts
sseidriver97 is on a distinguished road
Default

I would look at is to make sure your cable is properly attached to your throttle body.
I would also check the wires on the end of your stalk to make sure they are not loose or cracked,
sseidriver97 is offline   Reply With Quote
Old 06-19-2011, 01:23 AM   #4
Junior Member
Thread Starter
 
Join Date: Jun 2011
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
dmthornt is on a distinguished road
Default

Wires at the end of the stalk, not sure what you are talking about. But, I think I've check every wire that has anything to do with the cruise control system.
dmthornt is offline   Reply With Quote
Old 06-19-2011, 11:15 AM   #5
Senior Member
True Car Nut
 
jwfirebird's Avatar
 
Join Date: Dec 2009
Location: western,ny state
Posts: 9,616
Thanked 563 Times in 481 Posts
jwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond repute
Default

maybe you have a different vac leak thats allowing the vac to go to low to operate the cc.i doubt it would take much.
jwfirebird is offline   Reply With Quote
Old 06-19-2011, 01:21 PM   #6
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Considering this happens when the engine is hot I would be looking over the electricals. Something is getting hot and cutting out. Place some ice on the cruise module after it cuts out to cool it down. See if that helps. Another possibility is the crank sensor. If that'* acting up a little bit when hot it will loose the RPM readings and that could effect the cruise control.
Danthurs is offline   Reply With Quote
Old 06-20-2011, 12:47 AM   #7
Junior Member
Thread Starter
 
Join Date: Jun 2011
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
dmthornt is on a distinguished road
Default

Dan, I thought about the speed sensor, but the rpm and displayed speed are not affected and I think they use the same sensor. Also, the cruise control module is embedded in the dash LCD and not easy to get too. Some freeze spray may work if I can figure out which board is for the cruise control.

I'm going to put a vacuum gage on the cruise control inlet to see what the actual vacuum is.

thanks all.
dmthornt is offline   Reply With Quote
Old 06-20-2011, 10:08 AM   #8
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Keep us up to date on what you find.
Danthurs is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1984 Corvette Rough idle dmthornt Chevrolet 10 06-19-2011 11:19 AM
Abs and traction control quits sailbrd 2000-2005 1 11-01-2007 01:54 PM
'92 SSE --- engine quits running intermittently. BusMaster007 1992-1999 19 01-24-2007 01:44 PM
When to call it quits tallbump General GM Chat 32 11-02-2006 08:17 AM
Engine Quits BikerBob 1992-1999 9 05-23-2005 04:56 PM


Tags
cruise control

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 11:11 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.