I have a 08 grand prix 3.1 liter engine in the extreme cold some times it runs really rough, jerking like its starving for air or fuel. It doesn't do it very often, or every time. had same problem last winter. This is a very well maintained vehicle. new plugs, wires, coil packs. Runs perfect till it gets extremely cold. Help?
...yes, the Intake Air Temp sensor may be faulty~ https://www.google.com/#q=08+grand+prix+3.1+liter+IAT+sensor&tbm=shop
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