In the engine bay there is a humming noise.. The pcv actually vibrates with the humming noise. Car bucks when coasting in gear, seems like the pep is gone totally. I can't chirp 2nd w/or w/out a blower... On top of this my chain ( or so I think) is rattling. It has probably been doing it for along time but had blower on so I didn't notice it for awhile. Cleaned everthing except for the egr. Replaced lower intake with fed spec. Any ideas.
I purchased all 3 chain drive tensioners. What is the rumor that the maintensioner will not fit cause the size was changed?