OK I'm out here working on this thing and I checked under the oil cap while its running and it has strong vacuum pulling on the cap. I didnt take it off all the way. I just lifted it till the engine stumbled then put it back down.. I pulled off the CCC caps and the diaphragms are new and clean. So I checked everything good and put them back. Started it again and its the same. Should I have that much vacuum at idle on the 4.4? Or is there something else I should check.
Just trying to single everything out one thing at a time.