random misfire

I have a 2006 Buick LaCrosse CX 3.8L. I recently did a tune up on it, including changed all spark plugs and wires, and coil packs as well. Now for some reason that I can't figure out for the life of me it only is only running on 2 cylinders. The OBD2 says "random misfire. I know, common sense...

I recently bought a 2011 Buick Regal CXL with the 2.4 ecotec non-turbo (65k miles). I've driven it for about 5k miles and have started noticing a hesitation (misfire) at idle when the car is in drive (it would kind of rock the car). It happens seemingly randomly and at varying degrees of...

So for a few weeks the random misfire my '03 LeSabre was exhibiting was a bit of a mystery for not only myself but 2 different shops and about 15+ ASE tech hours. I went through all the basics of everything I read on this forum, other GM forums, or just about anything that would come up on a...