Vacuum Hose Problems?
Thread Starter
Heel & Toe
Joined: Sep 2004
Posts: 24
Likes: 0
From: Jonesboro Arkansas
Vacuum Hose Problems?
I have a 94 vette that I have owned for five years. It has close to 100,000 miles but is a great car. A couple of weeks ago, I was driving along on the highway an tried to set my cruise control and nothing happened. It had been working fine before then.
I told some of the members in my club about my cruise control problem and was told to check my vacuum hoses as they may have cracks in them or may have come loose somewhere. In the meantime, I turned my air conditioner on this weekend and the cold air only blows through the bottom vent and not the top.
Is this a typical sign of bad vacuum hoses and they need to be replaced?
Thanks for your help.
I told some of the members in my club about my cruise control problem and was told to check my vacuum hoses as they may have cracks in them or may have come loose somewhere. In the meantime, I turned my air conditioner on this weekend and the cold air only blows through the bottom vent and not the top.
Is this a typical sign of bad vacuum hoses and they need to be replaced?
Thanks for your help.
Le Mans Master
Joined: Dec 2004
Posts: 5,789
Likes: 8
From: Myrtle Beach SC
St. Jude Donor '05-'06
The other main issue with the cruise has to do with the switch just above the brake pedal. It is a vacuum release and if it slides too far back it does not re engage. The solution is to pull the hush panel ,push the pedal down grab the switch and pull it towards the firewall.You will hear some clicking as you do this. Release the pedal and slightly pull it back to the normal position to set the switch. Don't pull to hard on the pedal as there may be some play in it you are only trying to get it back to the spot it will sit at when you take your foot off.
Instructor
Joined: Mar 2008
Posts: 111
Likes: 0
From: York PA
I had the same two problems. I fixed those lines and a small hose on the other side and now I have cruise and air from floor ,vents, and the dash
Thread Starter
Heel & Toe
Joined: Sep 2004
Posts: 24
Likes: 0
From: Jonesboro Arkansas
I only had to replace the cruise control check valve under the fuel rail on the passenger side. I got the part from the local Chevrolet dealership parts department. It cost me every bit of $1.60 plus tax. I am going to buy several.
3rd Gear
Joined: Oct 2007
Posts: 3
Likes: 0
Vacuum Hose Problems?
I also have similar problem with cruise control and intermittent air conditioning settings. Sometimes the air controls work properly and sometimes not. I replaced the vacuum check valve, but this did not fix problem. Where would the next place to look be? If both systems are affected does this suggest looking at the vacuum lines at a particular location. Thanks.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
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
Instructor
Joined: Mar 2008
Posts: 111
Likes: 0
From: York PA
I also have similar problem with cruise control and intermittent air conditioning settings. Sometimes the air controls work properly and sometimes not. I replaced the vacuum check valve, but this did not fix problem. Where would the next place to look be? If both systems are affected does this suggest looking at the vacuum lines at a particular location. Thanks.
