Discussion Starter · #1 ·
Hey guys i have a 05 titan 4x4. I have a bully dog and a k&n cold air intake. i run 87 octane in it and i dont have the timing advanced or anything like that on it.. a few months ago it threw a p0171 and p0174 so i changed both o2 sensors and MAF sensor. It went away and ran great....for a while.. Now it has random lag in it and today it popped a p0301 (cylinder 1 misfire) and p0174 (bank 2 too lean) anyone came across this? any ideas?