My First Post... Cruise Control Question???
Thread Starter
6th Gear
Joined: Jan 2009
Posts: 6
Likes: 0
From: Morganton NC
My First Post... Cruise Control Question???
Hello all. After half of my life spent dreaming of having a Corvette, I finaly own one. 96 C4, LT4 6 speed manual with 64,000 miles on her; I'm in heaven 
. All is well with my new investment except for one thing, the cruise control does not work. I have checked the fues but thats not the problem so I'm hopeing someone here can help. Any advice will be greatly appreciated and thank you in advance.
. All is well with my new investment except for one thing, the cruise control does not work. I have checked the fues but thats not the problem so I'm hopeing someone here can help. Any advice will be greatly appreciated and thank you in advance.
Last edited by av8ersteve; Jan 16, 2009 at 10:23 AM.
Instructor
Joined: Oct 2007
Posts: 151
Likes: 1
The easiest thing to check first is the three way vacuum check. It's located on the right side of the engine coming off the intake manifold. One line goes into the dash for Air Conditioner control and the other line goes to the Cruise control valve.
Try that first
Try that first
Le Mans Master
Joined: Jan 2006
Posts: 6,564
Likes: 6
From: Woodstock Georgia
There are two vac hoses to the sevo (0ver the battery). One supplies constant vac to the servo to suck the cable in. The other goes to a switch on the brake pedal. When the pedal is depressed the switch opens and the servo loses vac, thus disengaging the cruise control. Might be a 3rd switch on a manual, not sure about that part, mine is an A4.
Congrats on the new ride!!!!
Congrats on the new ride!!!!
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
C3 Corvette Enthusiast
Joined: May 2008
Posts: 1,071
Likes: 3
I hve sorta the same problem - my cruise works sometimes, sometimes it doesn't. Sometimes it'll be locked on a speed then mysteriously disengage.
I have a new vaccuum valve and remanufactured servo unit sitting on my workbench. I may change them out next week.
Any other suggestions to this problem?
I have a new vaccuum valve and remanufactured servo unit sitting on my workbench. I may change them out next week.
Any other suggestions to this problem?
Safety Car
Joined: Dec 2007
Posts: 3,616
Likes: 5
From: Sandhills of North Carolina
Race Director
Joined: Dec 2005
Posts: 13,515
Likes: 12
From: Fisher, IL
I guess i'll add my input in here. The little plastic thing on the right side of the engine was broken on my car.
I found out because my air wasn't working. But that thing is pretty fragile if you ask me so i'd check there first as it's very easy to spot if that's a potential problem.
I found out because my air wasn't working. But that thing is pretty fragile if you ask me so i'd check there first as it's very easy to spot if that's a potential problem.
Intermediate
Joined: Jan 2009
Posts: 29
Likes: 0
From: Gastonia NC
Would like to jump in here also. I have a similiar problem. My cruise does not work either. The previous owner replaced the battery and there is a small plastic vacuum line that broke. I can not seem to see where it gets connected back to.
ALSO my vents in the car is stuck in the defrost mode. I am hoping the plastic line goes to the dash and that will solve at least one if not two of my problems
Thanks
ALSO my vents in the car is stuck in the defrost mode. I am hoping the plastic line goes to the dash and that will solve at least one if not two of my problems
Thanks