Hi everyone, I have an 02 ram sport 4x4 w/ a 4.7l. Heres the problem, I start it up and it runs perfect plenty of power. I drive a few miles and when it gets to normal op temp It loses all power and sounds like there is one cylinder detonating and nothing from the rest. throttle position doesnt change a thing it just doesnt go. I let it sit for about 45 mins and its fine for another five miles. before I go trouble shooting has anyone heard of this before? These are my only wheels and I really could use the help.