I have a weird noise at 3k is sounds like a wourring sound the goes away after that. Is like the second it hits 3k it happens, any one have any idea?

 

That's helpful...
I've got a rattling sound at 20mph but right after 20 mph it goes away, any ideas?

You have to give us a little more help than that, where is the noise coming from? Any rattling or vibrations along w/ it? It could be a number of things.

My buddies rig developed a "wourring" sound as of lately as well, but only on deceleration we discovered it was coming from the rear and wasn't brake related, turned out his rear-end was low on fluid.

Maybe could be the same thing? Give us a little more info, everyone on this forum is awesome-friendly and willing to help, but we will only put as much effort into helping you as you will put into it yourself

 

probably your k&n intake

 

Heat shield rattle? Need more info...

 

Cooling fan,radiator

 

Sorry let me update, it's not the k an n air fliter, this just started. It sounds like a wissel noise as soon as I hit 3000 rpm them goes away at 3500k I am gonna try to record it. It's just a weird sound idk where it's coming from, but I can just hear it in the cap. I think I am gonna jack up my jeep and spin the rear end and see if it's engine noise or drive shaft or transmission. It does it in every gear at all different speeds but as soon as I hit 3k it does it. I sorta think it might be valve train but not sure at all

 

No lose heat shields or exhaust already check all of that, those were my first two thpughts

 

Here is a video I found describing how to clamp a heat shield.

http://youtu.be/OO03n22rwfg