94 Jeep Grand cruise

Printed From: the12volt.com
Forum Name: Cruise Controls
Forum Discription: Cruise Control Settings, Tach Signal, VSS PPM(Vehicle Speed Signal Pulses Per Mile), Vacuum, Brake, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=54155
Printed Date: May 10, 2025 at 11:55 PM

Topic: 94 Jeep Grand cruise

Posted By: grafxpro
Subject: 94 Jeep Grand cruise
Date Posted: April 18, 2005 at 12:46 PM

I have a 94 Jeep Grand Cherokee Limited withe the 5.2 L, Auto, and it have developed a problem with the cruise control. I can set the speed and it will work, but after a few min. it will start to pluse in speed. It will slow down from the set speed and drop a few MPH then it will speed back up to the set speed. It will keep slowing down and speed up and the diffrence between slowing down and speeding up will get farther apart. What should I look for? Any Ideas?

Thanks in advance

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Thank's For All.......

Replies:

Posted By: mo12v
Date Posted: April 18, 2005 at 9:30 PM

Check Cruise Cable Slack............No more than 1/4 inch
Does Speedo jump also?
Make sure U have NO Vacuum leaks

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MO

Don't Learn from Others Mistakes
You Might Be the One That Knows.

Posted By: grafxpro
Date Posted: April 20, 2005 at 3:53 PM

mo12v] wrote:

p>Check Cruise Cable Slack............No more than 1/4 inch
Does Speedo jump also?
Make sure U have NO Vacuum leaks

Checked the slack and its ok.

No the speedo does not jump but the tach shows the slowing down and speeding up

Checked all of the lines and thay look good

Today it started to do its thing right from the start, could it be the controler?

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Thank's For All.......

Posted By: airandsound
Date Posted: May 11, 2005 at 10:13 AM

vacuum servo cruise?

Most likely one or more of the vacuum solenoids that allow vacuum through or bleed it off are sealing too well.
There is probably a small amount of oil on the plunger that keeps to sealed while the spring hasn'r enough pull to break that seal quickly.

so take it apart, wipe it off and reassemble.

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