I changed my timing tensioners ,cam phasers,vct solinoids,and all spark plugs!!! My 5.4l engine in my 2008 f150 is rumbling struggling to stay started. But when i unplug the vct solinoid it works fine no rumbling . But if i plug it bacvk in it goes back to struggle to stay on when i come to a stop light . What is the issue i'm out of thoughts!! Ford can't seem to figure any thing out but an expensive bill. Help !!! ALSO ENGINE CODE P0345 IS SHOWING UP (CAMSHAFT POSITION SENSOR A-BANK 2 CIRCUIT MALFUNCTION)

 

Did you ever solve this issue>? I'm going through the same thing. I just took out the valve cover on bank 2 and i'm trying to figure this out. My guess is the chain is off by a tooth.