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12-16-2017, 02:26 AM | #1 |
Registered User
Join Date: Apr 2015
Location: Northwest Florida
Posts: 287
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Finally got my cruise control working
Been messing with this thing on and off for a couple of years. 77 Chevy 3/4 ton Camper Special with factory non-resume cruise.
Basically it needed everything. I found a NOS diaphragm on eBay. Found some beaded pull-chain from a ceiling fan to connect the cable to the diaphragm. Got a new vacuum transducer, rebuilt from Oreilly's. Fixed a bunch of vacuum leaks. And finally I found a mess in the electrical wiring on the brake cruise disabling function. A previous owner had installed (badly) a brake controller that had been disconnected and taped off and once that was put back to normal, it worked. It needs adjusting because it speeds up about 4 mph after the cruise is enabled but it does work now.
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77 Chevy K20 Longbed 86 GMC C3500 Dually 07 Silverado 2500HD All standard cabs |
12-16-2017, 05:48 AM | #2 |
Registered User
Join Date: Jun 2003
Location: ga
Posts: 630
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Re: Finally got my cruise control working
I am glad that you got your cruise working it remined me about a 82 suburban I has working on. the factory cruise it wasn't working properly so I was fooling around with it one day I had just left out the driveway and the truck got up to about 45 mph so I pushed the button and when I did the vacuum diaphragm sucked up and it held the throttle wide ass open it jumped up to 60 mph quickly I tried not to panic but I was headed towards the hwy I tried everything to get it to stop but the suburban kept getting faster and faster I hit the brakes as hard as I could it did nothing it just kept going I cut off the key and that didn't work so I then had to shift it up into netural it was screaming running wide open at about 7000 rpm but I was able to get stopped before I had to stop at the hwy I just knew it was going to spin a rod or something but it made it thru and after that I took off the vacuum diaphragm off and thrashed it . lesson learned
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4x4k30 if trouble was money i would have plenty |
12-16-2017, 07:36 AM | #3 |
Senior Member
Join Date: Oct 2014
Location: Ohio
Posts: 6,890
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Re: Finally got my cruise control working
That's good news.
When I bought my truck, mine didn't work either. But when I put a new Edelbrock Carb on, I saw the rod wasn't set to the side of the carburetor. It was missing the little clip that kept the rod from sliding back off.
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12-16-2017, 11:10 AM | #4 |
Registered User
Join Date: Apr 2015
Location: Northwest Florida
Posts: 287
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Re: Finally got my cruise control working
I had to get the cable connected to the carb too. Forgot to mention that in the OP.
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77 Chevy K20 Longbed 86 GMC C3500 Dually 07 Silverado 2500HD All standard cabs |
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