K i have an 04 f150 with a K&N CAI and straight pipe with read cat delete. TUNE UP DONE YESTERDAY(new plugs, fuel filter, rad and trans flush) I was parking it today and it stalled. Checked my RPM and in park it idles at around 500rpm and in gear it idles around 400ish. Seems low but not sure never really notcied it before....Thanks again guys!

 

Almost all 04's need a custom tune to run a CAI or it will run lean, that might be your problem.

 

ya got my edge on its way, then gunna send it to PHP. Just seemed odd thats all. Thanks