noise&jerking

It would be best to have your vehicle inspected by your local repair shop and perform a compression test to see if a cylinder is low on compression or bad ignition parts and if indeed you have a lower end noise in your engine. A compression test will tell you overall condition of internal engine components.

<<<<mmmmmm<<<< take it back where you bought it ,, this vehichle will just cost you alot of money, and be a problem as long as you own it Sorry for the negative answer ,, but just being honest