I have a F150-4.2v6 that has been hard to start. turn over a lot befor starting. now it wont start at all. no codes (checked with scan tool), 40 psi fuel, new air filter, plugs, fuel filter. I am thinking it may be injectors. any sugestions how to go forward. thanks in advance.

Gary

 

Pull the spark plugs, if the porclin in the center is white or green you've got a coolent leak. I've been having the same problem. Could be the lower intake gasket.

 

If it is, change it fast.

if it turns into a big leak, you are facing possible hydro lock and a lower end rebuild.