2006 with the 4.7. Sitting in drive with your foot on the brake, the rpm's will go up and down a couple hundred or 2, and when you put in park, it will shoot up to 1000 rpm. I already changed the tips on it, which fixed it for about a week or two, any ideas? And thanks!

 

Throttle position sensor?

 

Opps, i see i typed " i replaced the tips" i meant the TPS....my fault.