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1981 cruise control issue

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Old Sep 26, 2017 | 08:14 PM
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Default 1981 cruise control issue

The cruise control on my '81 Corvette is working, but only if the speed is around 35-40 mph, anything higher it will not engage. Any ideas as to what the problem is? Thanks.
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Old Sep 26, 2017 | 09:31 PM
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The only difference between 1979 and 1981 was the resume wire..

So this manual should help you with some insight as to your issue.

http://repairs.willcoxcorvette.com/w...iagnostics.pdf
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Old Sep 27, 2017 | 09:11 AM
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Thanks, that gives me some good information on how it works.
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Old Sep 27, 2017 | 10:01 AM
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My "guess" is that the control head is clogged with ? and is blocking vacuum passage. You can remove and partially disassemble to clean it out. Since it works properly at some speeds, it's unlikely to have an electrical problem, IMO.
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Old Sep 28, 2017 | 05:47 PM
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Thanks, I will also plan some clean up. It is a 5K mile car, so not sure too much could be wrong with it.
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Old Sep 28, 2017 | 09:04 PM
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A 1981 Corvette with 5K miles... Did the Golden Gate Bridge also come with that deal?
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Old Sep 29, 2017 | 09:09 AM
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Originally Posted by 7T1vette
A 1981 Corvette with 5K miles... Did the Golden Gate Bridge also come with that deal?
No, but the original tires, wheels, battery, and most everything else it was delivered with 5K miles ago did. And it just won the NCRS Bowtie Award for untouched originality at the National, with 97%+ in all four categories.......
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Old Sep 29, 2017 | 06:47 PM
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Touch'e

Last edited by Z28ImpalaSS; Sep 29, 2017 at 06:48 PM.
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Old Sep 30, 2017 | 03:26 PM
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Outstanding!!! [amazement ensues...]
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