I have a raddle at idle and when ac is on it get louder. when I give it gas the noise goes away.... I have checked the turbo and no problem there. I open the turbo and wast gate and fins are tight. Checked the flex plate by the crank shaft bolt and the fly wheel and everything is tight. please point me in the right direction.

 

Just in case I did not understand all you stated.

Check the crankshaft pulley itself. the outer part of that pulley is held in place with rubber filling. If that filling has gone away ,it will give notice as you explained and can produce a rattle or knocking at idle.
Have seen this only once, but took a while to find it..
Please let us know what you find, thanks.