1991 GLI 16 valve problem!!
 

hello I have a 1986 GTI with a 1991 GLI 16 valve swap and when i start the car it fires right up fine but right away starts climbing rpm's until I shut it off so it doesnt blow. I looked at all the throttle linkage at everything is at idle but it still shoots right up to about 6k and im not sure what it is. any help is appreciated.

thanks