Hello, i have searched this formun and can't find the topic i need. I have a 04 F150 4.6 and the throttle sticks. It idles up and down, when it idles down you can hear the lifters knocking. I have to punch the pedal for it to stop. Can anyone help me? Thanks

 

Are you getting any codes? Try cleaning the MAF with CRC MAF cleaner.

 

Try cleaning the inside of your throttle body with some carb cleaner.