Quote Originally Posted by BeezyPlatt View Post
i have a 06 grand prix gxp and bout 2 months ago my car started sputting/missing when i accelerate. i figured that maybe i bought some bad gas or one of my spark plugs fouled out. when this happened my check engine light came on so i put some gas treatment in & it then later went off. i then changed my spark plugs a few days later. the other day when i filled up my gas tank it did it again immediately so i put more gas treatment then the problem stopped. later on that evening my car started doing it again and the check engine light came on. I put a scan tool on it and the code P3449 came up which read "Cylinder 7 Deactivation/Intake Valve Control Circuit/Open". Has this happened to anyone else before? if so what can i do to resolve it?
This happened to me too just recently. I drove about 2.5 hours on an interstate and once i reached home and in town driving, my check engine light came on and acceleration was rough and didn't idle real nice. i put the code reader on it right away and said "cylinder 7 misfire" {i had some bad battery problems earlier, so maybe ignition wasnt very good and it go thrown off once?} who knows. i simply erased the code and started and drove just fine and the light has yet to return. sometimes the system gets wet or something so little goes wrong and the car throws out a code right away.