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Re: 2003 Expedition missin on #6 and all others
"Then there is the possibility of having a burnt valve. A burnt valve will cause your P0306 but generally you would notice a constant skip and it wouldnt be random."
What exactly is a burnt valve? How does this happen and how does it affect the engine?
I had a P0303 code after all kinds of misfiring but luckily it cleared on it's own somehow. But I've never felt the engine ran smooth or as well as my friends who have the 5.4 engine. I'm wondering if resetting the computer by disconnecting everything would help??????
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