I have a 1994 f150 w/302, I pulled the heads to change head gaskets and the #1 cylinder on the bottom of the head is white, the only thing I can think of is its burning leen. The #3 head is really black and dirty. I don't know much at all about this stuff. Any help would be appreciated thanks
It's possible you have a dirty injector so it would be a good idea to have them professionally cleaned or replace them with a reman set. The PCV valve dumps into the rear of the upper intake and as a result the rear cylinders often see more oil, a fix for this is to plug that hole in the upper intake, put a longer hose on the PCV and connect it to a spare port in the vacuum tree.