Anyone know of any good elimination diet?

Look on the web. Lots of material on the web, and multiple books. Just one site--not one with which I have any relation--is http://www.Precisionnutrition.Com/elimination-diet. You also can find doctors or nutritionists who specialize in this, if you want to step-by-step help. Basically, it entails stripping away as many foods as possible that might cause trouble, them slowly reintroduce them one by one.