Ok well I found a crack in it and I'm getting a P0171 code twice and P0300 code. I just bought the car 3 weeks ago and my 30 day warranty is up soon. He said my warranty will not cover a misfire code unless it has to do with the lubrication parts of the engine.
I know it has champion iridium plugs (pulled one off today) and it looked ok. A little black though.
So could the booster thing cause the P0171 code?