i've searched and searched and search but couldn't find anything similar to my problem.
I have a 2004 grand prix gt2, with a k&N filter setup and an exhaust system starting after the cat.
When i go to start it, it starts fine but then bogs really low in the rpms, almost stalls some times but other times its fine, and then goes to perfect idle. It doesn't throw any codes or anything. The guy that i bought it from said it has done it from the day he bought it, and even had a tune up done to it, which fixed the problem for a month or so but started doing it again. any ideas?
