What would cause the rich p0172 code to be thrown ?

 

Pegged -25% LTFTs...could be caused by quite a few things...Most likely a MAF that isn't tuned correctly for the intake you're running. What year is your truck? Does it have the MAF that is integrated into the airbox lid, or a separate one? What other mods do you have?

 

2011 cammed stalled geared, headers, built trans, open cone filter intake with no air box.... Wheatley tuned .... And the problem came after I tried to put on that stock airbox with MIT and drop in filter, it ran like ****... Changed it back, the code popped up then went away and is back ... I'm goin in for a retune with Wheatley tonight to check her out

 

So you had a new MAF sensor to go with your open cone filter intake? If so, they probably had drastic differences in their calibrations...that is more than likely what caused your starting/driveability issues.

 

no.... I have the same MAF sensor I originally had the open cone filter when I got tuned ... Then I put that airbox in and that panel filter. That's when the problems came.. Then after that I put back my open filter assembly back on.