thanks. i tried the maf and i made sure there weren't any leaks, so i ran the Techron through with some high octane gas and it went right out. how often do i have to add this? and is this condition harmful to my vibe?

A few monts ago i put an aftermarket air intake and a borla muffler on my vibe. It seems to be running fine, but the cel is on, with a P0171 code. Every now and then it'll go away for a few days or even a week, but it always comes back on with the same code. Could my intake be causing the lean condi...