Rpm moves at stop.

[armevo4]

Dear evo owner .im having trouble with my car for a while now I hope u can help me . Whenmy car antyfreeze is at 90 degrees it means that the rpm 900 when it is not on gear . Everythime that im stoping the rpmis normal than it is moving alittle bit and the boost gauge pressure also .then stoping at nomal rpm .when im opening air conditioning its showing worst specially the boost guage moving up down updown . I hope you undestood what was the problem

Thank you

 

[D1andonlyantman]

It's pretty hard to understand exactly what you're saying but you should know that things happening with other components can make the revs change. For example, if you sit in neutral and start steering left to right the revs will increase because of the power steering. I hope that's a small help