Aftermarket cam and no tune. Duh!

Likely other problems as well, but start with the obvious.

 

dont post rude things in my thread, if you have something that will help fine if your going to act like my 9 year old dont post things to me. i had this same cam in the other motor and that did not cause break up or ba gas, no tune so do your home work likethe guys who have helped me