Originally Posted by dschluet
I checked the CAI to see if maybe it wasn't fully connected or was dirty. It did look like the tube that connects to the engine bay wall wasn't fully in place but wasn't hanging free. The connection to the air filter housing doesn't seem to be the tightest either. The air filter didn't look too bad. Do you feel that it needs to be a snug fit or is it okay that it is a little loose?
Is it a quality CAI unit? I had a low cost unit I put on my 06 with the 4.7 and it actually caused a drop in mileage and kept throwing computer codes. Replaced it with a K&N unit and saw an improvement. Is it possible that you are getting leaks with the lose fittings?