At 4.000+ rpm the motor asks like it has hit the rev limiter and at an idle when you give it gas the motor takes a couple seconds to come back to a idle.
JA: Has the vehicle turned into a gas hog? And how does it start -- same as usual?
Customer: Starts normal, no codes, haven't drove it long enough to check fuel mileage.
JA: What is the model/year of your Dodge?
Customer: 2001 Dodge Durango RT 5.9
JA: Are you fixing your Durango yourself? What have you tried so far?
Customer: Yes and have done nothing except check for codes.
JA: Anything else you want the mechanic to know before I connect you?
Customer: only thing other is misfire on #5 and have replaced plug, wires, cap, rotor, and cleaned fuel injector