07 5.4 screw rough idle problems
Member
Joined: Jan 2012
Posts: 51
Likes: 4
The cat has been replaced, the problem now is the pos is retarding the timing, drops below 500 RPMs at stoplights then dies. Not to mention its dangerous. This engine design is the biggest pos on the planet. **** poor design and lack of Ford owning up to their problem. Btw I've owned 3 mustangs 2 explorers and 4 f150s. I hope some Ford exec is reading these posts and see how pissed and frustrated people are.
Believe me I feel your pain. I had to get a new engine. Ford/warranty company ate 5k of the 8k cost. My bank account ate the rest. I would love to have the new 5.0 in my truck instead of the 5.4. Heck for that matter I would take my old 4.6, that engine leaked oil/coolant and still never died.
Senior Member
Joined: Mar 2009
Posts: 1,062
Likes: 50
You need to have the oil pressure checked with gauge and make sure it's steady and to spec. Try disconnecting VCT solenoids to see if anything changes. The fact that both side are over retard I doubt it's The VCTs and suspect that what you have is low oil pressure.