ok thanks for the info

i have diablo predator u 7137. on a 2005 dodge ram 1500 4x4. with 4.7 gas engine. i installed the 87 performance tune and my rpm is very low and sometimes boggs dowm and dies when turning. i attempted to reinstall original back up but same problem

i retarded my spark -5. that seems to help

yeah exxon, now bp

yeah exxon, now bp

i meant spark advance adjustment. im using 93 octane and still gettink valve chattering

i am a new user. i have a 2004 mustang gt. i installed the diablo tune and the valves were knocking. i retarded the timing -10 and it seemed to help. would that hurt my engine on 93 octane?