My car just started doing this, when it idles it sounds like a chattering sound under my intake,it goes away when I rev it up to about 2500 rpm then it runs clean,I checked for vacuum leaks and didn't find any,after it warms up it won't start I have been searching a lot of posts and it sounds the same as the ssv making noise.i can move the ssv linkage freely but idk if that would cause my hot start problem? Thanks hope someone can help