electric choke replacement problems

[1986gmc]

So I replaced my electric choke on my holley carb on my 86 gmc, cause the fast idle cam was broke. But now that I got the new choke in. I start the truck up and it goes straight to between 4000 to 5000rpms.So I push the air intake down to about where its suppose to be, and set the choke. But i think the choke just keeps opening all the way cause it never stays. I dont really know anything about carbs im trying to learn. This is my first carbureted vechicle, i bought it to restore. but now i cant get it to run cus of this problem. I dont know it that is enough details on the problem or not