i have a 2004 nissan sentra, when im stopped the car idles down to like 250 rpm then back to around 750 unless it dies out. when it dies out it always restarts. I brought it to the nissan dealer and i got nothing, it would idle rough for them, like usual, i explained it to them and they just ignored me, all they do is just try to F*** you over...I have had other attempt with the nissan dealer, squeeking in trans, belt noises, trunk problems, glove box falling out and more..plenty more...They actually put the belts on wrong 40,000 miles ago, and now their trashed and squeeking, so my dad replaced them for 25$ when the dealer wanted 250$? when they origionally put them on wrong in the first place! i hate nissan service people, love the car but hate them. So anyway lol what could be the problem with my idle???