After you mentioned that my bro in law decided to do a compression test on the #5 cylinder. That should help find the source right. Thats were the lifter was bad. So we checked it and he said it hit 60psi and leaked down, but he wanted me to see it and then it hit 150 and held fine. Hmmm. I just wish I knew what killed a brand new lifter that is suppose to be better than what was already in there. Then next step in lifters it the cts race lifters that run 250-280. This is gonna kick my ass.![]()