Hi,
I've been following this thread with great interest. I recently had to remove the upper manifold to change out my valve cover gaskets. A pain in the neck that I'm glad is over, or so I thought.
Once I got everything back together and cranked up the truck. Idle was at the "high" cold engine rpm's. But it never kicks down now. Never had this problem before...
Could this be a vacuum issue? I thought I was extremely careful about labeling and rehooking all back up the way it was but accidents do happen.

Any ideas are greatly appreciated.


Thanks,
Cjax