my truck started codeing today went and had it checked came up as p2004 intake manafold regulator stuck open bank one. my truck is a 2004 f150 with the 5.4 in it. i put dual exausts on it about a week ago its a dual in dual out flowsound or some knock off. wanted to know how to fix it. i have read some on the gotts o2 mod but i dont know much about this type of stuff.