cruise control servo
Thread Starter
Intermediate
Joined: Mar 2016
Posts: 36
Likes: 1
From: Leamington Ontario
cruise control servo
I am not a mechanic but I am going to try to change out my cruise control servo on my 86 vette. I am wondering if there is anything that I should be concerned about or should I leave this up to a mechanic. Thanks.
Melting Slicks
Joined: May 2014
Posts: 2,855
Likes: 582
From: New Port Richey FL
No problem you will need a 7mm socket a 11mm wrench, Carefully pull the rubber boot out of way by cable to get to the pull chain and release it (note the amount of slack in chain). unplug, unscrew, install in Reverse.
If when the new Servo is in and if chain doesn't look the same adjust it if needed.
Now why do you think your Servo is bad. Did you check the Vacuum on the small hose and weather or not the large hose is properly sealed to the Brake switch, and holding Vac. when applied
Thread Starter
Intermediate
Joined: Mar 2016
Posts: 36
Likes: 1
From: Leamington Ontario
cruise control
No problem you will need a 7mm socket a 11mm wrench, Carefully pull the rubber boot out of way by cable to get to the pull chain and release it (note the amount of slack in chain). unplug, unscrew, install in Reverse.
If when the new Servo is in and if chain doesn't look the same adjust it if needed.
Now why do you think your Servo is bad. Did you check the Vacuum on the small hose and weather or not the large hose is properly sealed to the Brake switch, and holding Vac. when applied
If when the new Servo is in and if chain doesn't look the same adjust it if needed.
Now why do you think your Servo is bad. Did you check the Vacuum on the small hose and weather or not the large hose is properly sealed to the Brake switch, and holding Vac. when applied
Thanks again.
Rick Dutot.
Melting Slicks
Joined: May 2014
Posts: 2,855
Likes: 582
From: New Port Richey FL
I sent you a reply yesterday from my phone and not sure if it went through or not so I thought I would try again. Thank you for your time and information. I did have all the hoses checked and it does hold vac. I would set the cruise say at 87 mph and it would drop to 86 then back to 87 and so on. At times it would settle down and stay at 87 then it would start all over again and this is all on a level road.
Thanks again.
Rick Dutot.
Thanks again.
Rick Dutot.
Chain Adjustment Chain should have a Little Slack in it. you don't want it tugging on the throttle or Hanging sloppy loose
Last edited by s carter; May 6, 2017 at 09:48 AM.
Drifting
Joined: Dec 2012
Posts: 1,504
Likes: 73
From: Georgetown TX
I'm having that same problem on my 89 auto. CC works but not right. When it tried to keep speed steady, it excellratee much to hard. For example if the speed drops one mph, the CC comes on to advance speed , but too harsh. I think it might be in adjustment but not sure if I need to add slack or tighten up slack
hiw can you tell if servo needs to be replaced?
hiw can you tell if servo needs to be replaced?
Melting Slicks
Joined: May 2014
Posts: 2,855
Likes: 582
From: New Port Richey FL
I'm having that same problem on my 89 auto. CC works but not right. When it tried to keep speed steady, it excellratee much to hard. For example if the speed drops one mph, the CC comes on to advance speed , but too harsh. I think it might be in adjustment but not sure if I need to add slack or tighten up slack
hiw can you tell if servo needs to be replaced?
hiw can you tell if servo needs to be replaced?
The slack in the chain if it's to loose it limits the amount of throttle range and make the Servo jump to fill the gap, if you have to short it may hold Throttle open a bit screwing with the idle
Last edited by s carter; May 6, 2017 at 05:17 PM.
