so the other morning i started up the gtp so i could jump start the gt. 5th time in the past 2 weeks. i know its cause its getting cold batterys goin blah blah, so anyway i started the gtp and let it warm up a min, pulled it over to my gt and shut it off not thinking (it was early and i wake and bake hard) so i turned the key and nothing. nothing at all. needless to say i was late for work. i drove my gtp like 2 weeks ago and while driving going like 40 just coasting down a hill the idle was bouuncing from like 900 to 1200. someone said altenator? car started up fine with a jump. havnt gotten around to tryin to stat it again. any ideas?