I've been having an issue for quite some time now, and have yet to find the solution. I've searched everywhere on here and the net in general trying to find a fix to these issues.
My car runs rough at idle, but smooth when up to speed. There is a CEL that came up as a cylinder 3 misfire. The Service Traction light also comes on and the vehicle shifts hard from first to second, and sometimes from second to third. Again, when the car gets up to speed, the shifting smooths out.
Here is a list of things I've done, (and approximate cost for those who want to do it themselves).
Cleaned Throttle Body - ~$5
Cleaned MAF Sensor - ~$8
Replaced Spark Plugs - ~$50 (plugs, socket, grease)
Replaced Fuel Injectors - ~$170 and approximately a pint of blood
Replaced Air Filter - ~$20
The things left on my to-do list are:
Fuel Filter - ~$30-70
Ignition Coils - ~$250 for all four
I think before I order ignition coils, I'm going to get a scanner and move the coils around to see if the misfire follows them. If not, I can rule out the coils.
Any other ideas? I'll keep this thread updated as I keep trying stuff.
EDIT: This is a 2009 with the 2.2