Just realized my cold air intake was causing a lean code after a year of no issues

I was driving up the grade on I-5 near Redding when the check engine light came on and the truck started hesitating. Pulled the code at an AutoZone and it was a P0171, so I checked the intake tube and found a small crack near the clamp that I must have overtightened. Has anyone else had a lean condition pop up out of the blue after a mod had been working fine?

2 comments

2 Comments

perry.evan1d ago

Ever check if the crack let in extra heat from the engine bay? Hot air is less dense, could mess with the MAF reading even more.

gavin_kelly911d ago

Man, a whole year before it gave up the ghost? That's some impressive delayed failure right there. Gotta love when a tiny crack you can barely see decides to ruin your whole drive. Bet that hesitation felt real nice on a grade. Classic case of "it was fine until it very much wasn't.