Iam about to do a thottle body cleaning on my wifes Lincoln this weekend, its having these weird idling issues at the red lights when you stop in drive. I talked to our company mechanic, he told me this a common problem on 4.6s, and he gave me directions on how to do it. He claims its best to remove the throttle body from the car and thoughly clean it along with another doo dad next to it. I think Iam also going to clean the MAF sensor, carefully, I bought this MAF cleaner made by CRC, on her car you can clearly see the resistor wires so Iam going to just give them some light sprays and call it good, I hear they are extremely fragil. The mechanic also told me not to use carb cleaner and to make sure I got thottle body cleaner for fuel injected vehicles(Non chlorated), which I did again CRC. The car only has 65,000 miles on it, but I pulled the intake hose back and it looks black and dirty inside the throat, it gets dark so early, I figure Ill tackle it on a day I can put it all back together, the same day.