hey guys awhile back i posted that my truck (2000 ram 5.9 V8) wasn't running right and long story short ended up dumping about $700.00 bucks to get it running right. Anyways if you have a Ram w/ a 5.9 in it and has a rough idle the first thing I would change is the pre-cat O2 sensor because thats what ended up fixing my problem, not saying it will fix yours but it seems to be the most common answer on this forum. So anyways if it wasn't for these guys on this forum my truck would prolly still be running like a chevy (a Turd)! THANX DODGE FORUM!!!!