I played around with the tuner on my 2008 6.4 powerstroke. No mods other than tuner, the performance tune ran well. I tried extreme for a few mile drive. Plenty of power through 1st and 2nd. Once I hit third rpms dropped to 1000 and wouldn't wind up until I dropped back to second. Trans was also in ...

I played around with the tuner on my 2008 6.4 powerstroke. No mods other than tuner, the performance tune ran well. I tried extreme for a few mile drive. Plenty of power through 1st and 2nd. Once I hit third rpms dropped to 1000 and wouldn't wind up until I dropped back to second. Trans was also in ...

Thanks Mike,

Can you elaborate a little as I'm new to diesel modifications, are you recommending not to delete the EGR/DPF? Or are you saying the tune will not function properly with these type of mods?

I just purchased a 7164 predator tuner. Is it a must to delete my egr and dpf immediately to operate the performance tune? Thanks in advance