Crusie Control sensitivity? (fluxuates)

swilk

New Member
I've got a 90 manual GS with a 93 swap from an Automatic. (doubt the automatic part matters). My cruise control will turn on and when I set it, the dash light comes on. I can feel it set the speed but it won't hold. It will speed up on its own and drop back down after a bit. Any ideas? I'm thinking some sort of sensitivity or vacuum leak? any advice is appreciated. :)
 
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