Hell that's the last option after everything that I've done. Saving the most expensive for last ha

 

Yeah it sounds like a cracked injector

 

Been a while since I've been on here but I finally found this post again. It turns out it was a leaky injector. It was leaking internally. The first company didn't find it or didn't test it right or whatever. But i fixed that problem and I still have one more. Idk I'd anyone knows or had this problem. My truck bucks and hiccups on WOT in 4 5 6 gears around 19-2100 rpms