2007 Pontiac Montana Rough Idel

Tiny
JAYBALLS12
  • MEMBER
  • 2007 PONTIAC MONTANA
  • 126,000 MILES
I have had my van which is a 2007 Pontiac Montana 3.9L at the dealership and they say it is normal but the issue is it idles rough when cold no engine light or codes but once it comes up to temp it runs like normal any ideas?
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Wednesday, September 18th, 2013 AT 4:36 PM

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Tiny
CADIEMAN
  • MEMBER
A bad spark plug
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Wednesday, September 18th, 2013 AT 5:13 PM

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