I have a 05 Gt put a cold air intake and took mufflers off,running straight pipes from cats back,she used to idle at 1000rpm now like 500-600rpm. obd code said mass air was told to get programmer,DIDN'T work, replaced Mass Air sensor still doing it. Wondering if it has to do with the change in the exhaust.Really frustrated any help is appriciated.

 

It needs to be tuned, any changes you make on the 05's and up need to be changed or adjusted in the tune.

 

you need a program with most Cold Air Intakes on the market. From the sounds of if you need a CAI tune and some other tweeks here and there..

http://www.cjponyparts.com/sct-x3-po...-2013/p/XCAL3/