CC only starts working about 45 mph no lower an when i set it it just tears off up to a random speed then slows down an then speeds up again an it keeps doing this.
I have no clue what this is please help

 

anyone ?

 

If everything is hooked up properly the only thing I can say is that the CC is controlled by the PCM. Check the connections at the servo, the connector where it leaves the steering column, the speed sensor, and the PCM. Also the linkage at the throttle body where the cable comes from the servo. Make sure it's not binding.
And Welcome to CF!
Dan