I have a 05 base Grand Prix. I put on a K&N Cold Air intake and dual exaust. From time to time after I start it and get going the engine sputters like its not firing on all cylinders or something. From a stop it really hesitates to get to second gear. But if I turn the car off at a light or something then start it right back up it won't do it anymore. Wondered if Anyone had any thoughts about why it might be doing this? Didn't know if it had anything to do with the two small mods or anything. Thanks
