No that wouldn't happen with the air here are a few tips from tips page that
other shops have found an d may be your cause.
. Replace the isolator bolts holding the middle intake down. Just had the same truck and condition. Can see with the scannner showing upstream O2 pid, spray carb cleaner at lower to middle intake, and watch pid go to rich. Good Luck! Bolts $6.00 each at ford.
Either the 90 degree elbow for the P.S. Pcv hose (under the throttle body kinda hard to get to but you still can) or lower intake gaskets. Fel pro sells an updated kit for this. Also check this pcv elbow for sure as well as any grommet for holes in them as that wil do the same thing.
Sunday, February 16th, 2014 AT 3:30 PM