Re: 2011 Terrain AWD 4 cyl surging / jerking at idle
That's good - at least you have a clue. Sometimes the code will indicate which cyl. is misfiring, or some of the bluetooth or USB diagnostic equipment, and for well under $20 will def tell you which cylinder is guilty. But, without fill info, I would probably just buy one coil pack, and do some guessing. Actually, pulling all of the plugs will probably add to you info. "One of these plugs is not like the other". Sounds like "fun" - do you live in Upstate NY ? I'll offer some help !
2010 Equinox LTZ<br />4 cyl, FWD, S/R<br />Cardinal Red/Black