I noticed the other day after my truck warms up when i put it into park it surges to about 900-1200 but it only does it every now and then. it also does it 1st when i put it into park and then if i turn the a/c off before i kill it. Im not sure what the problemcould be but i noticed it about a week after i smoothed out my TB, i didnt port it, the TB looks the same as before i just smoothed it out with 800 up to 2000 and then polised it. so i guess you could say i just polished it. Thanks for any and all help......

 

Have you checked all the sensors on the TB?

 

its DBW what sensors are there to check? im not really ue to the DBW but i know all the sensors on the older models but what about the 03+. THANKS!!

 

Not sure? I didn't think of that. Sounds like an IAC acting up?