Thanks guys for the replies. I went to home depot and got a CO detector that works with 3 AA batteries. it was $49 but hey atleast i'll rule this possiblity out. I'll try to put that in the car and leave the car running for a while. I'll keep you guys posted with the results.
Happy new year to all of you.

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Whether you think you can or cannot, Either way you're right!. by Henry Ford.