I just bought a 2005 grand prix a month ago, since then i installed speed daddy headers. I have a slight misfire at idle when its in park, it dosent seem to happen while driving or idling in gear. i stopped and got the codes read, it has a few for the converter because its not there anymore. The other codes are P1133 for bank 1 sensor 1, and i replaced that sensor the day after i bought it when it still had the manifolds and converter. P0133 bank 1 sensor 1 slow response. P0243 supercharger wastegate soleniod.
it also has brand new stock replacement plugs and wires, I also ran some fuel system cleaner thew it. I am going to be changing the lim gaskets this weekend and figured i would clean all the grounds and stuff while im in there. I also watched the boost bypass solined and it opens when its running and closed when its off. What do you guys think is wrong ?
thanks
-josh
