Here I show how to repair a Cruise that will engage (light comes on) but will not maintain vehicle speed. There is a foam filter that deteriorates, crumbles up, and clogs or jamms up the vent valve.
This system was used for many years on GM cars and light trucks. Virtually all the cars I see of that vintage now have this problem.
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Hey thanks for posting and doing the video very well done. I have a 85 GMC that was my Uncles I replaced the servo years ago always worked but the truck sat for about eight years and when I went back out didn't work. I took the servo off and took it apart but I am sure I put it back together wrong. But one thing I did do is put my fingers over both ports before dissembling and the diaphragm would not hold. It cam back out these servos are being phased out from the remans if you can find some on line pick them up before long you wont be able to get them anymore thanks again
What if i use a new dish sponge for the filter?
hhmmm My 6.2 diesels cruise in my 82 gmc truck keeps speeding up and slowing down when I set it then just gets worse and worse over a few minutes to the point it will slow down 20 mph or speed up 20 mph over the set speed.
I was wondering if a small lawn mower engine gasoline inline fuel filter would work better than that filter demonstrated. Just place it a couple of inches away from the servo. A clear plastic filter would seem ideal. Just a thought.
Excellent video!!
Hey, David- my '89 recently set a BCM code B672 CC Vent Solenoid circuit problem, so I just get the "CC system disengaged" message on the CRT. I'm going to use your video as a guide, to attempt a repair. I'm surprised that your unit still works- because the green paper tape winding appears to have delaminated from the solenoid barrel. If mine is actually a broken wire- that is easily repaired with new wire and masking tape, or unwind it to the break and re solder. The hair wire is available from an old speaker, but it might not be coated, so would have to spray paint it first before winding it. If I can't repair it- I'll have to buy a new one for $70.99 + S&H http://www.rockauto.com/en/catalog/buick,1989,reatta,3.8l+231cid+v6,1019900,electrical,cruise+control+servo,2652
my 1995 cruise control dont work and i dont know why too .i would love for it to work
I have a 92 Buick Century and your video was awesome. The only difference in mine is there is a contact bridge which eliminates the wires from the solenoid. I used a strip from a universal filter pack for a lawn mower and it works awesome. Total cost for repaired cruise control, $ 5 for filter pack. Thanks again
This is awesome! I was just quoted $300 for this repair and I found a NOS servo to install. I could have just repaired the original one. I think I'll box the new one up and fix up the old one soI'll be back in business. In all seriousness, you should have a link where those of us who appreciate what you've done can donate. I certainly would because this is going to save people way more money than you'll ever make. Thanks mate!
Super helpful. Thank you so much.
Awesome video, thanks for posting! I can't wait to tear down the servo in my '87 LeSabre (I noticed you have the 3.8L too on the Century) so this video is the exact thing I need to fix mine. My cruise worked until the car sat parked for a few months, guess I shouldn't complain about nearly 30 years of flawless operation!
Very good mate! Thanks for your effort, it worths all the details, zooming in, explaining every detail… We are learning a lot from guys like you.
Sounds exactly like what my wife's 91 Regal Limited Coupe's cruise control is doing! Well, mostly. Back during the summertime, it also had an issue where high load (e.g. hill climbing) in OD would cause the air conditioner vent door to switch to the floor, then switch back to the dash vents (or defog/defrost, if it was set to that) when the load returned to normal (e.g. level road). It hasn't been doing that lately though… your thoughts, David?
Also, "down here in the South, people are courteous" – YES! We noticed that when we went through Arkansas on the way to Texas. Slower drivers would usually pull off to let faster ones pass. That's such a contrast to Iowa, where combines and tractors (and elderly Buick/Toyota/Ford drivers) hog up the roads. Then again, most of our roads are open and straight, so passing isn't as much of a problem (unless you're on IA-17).