Hello Dave w.I was finally able to get to see the files u sent for mpfi 7427.I have loaded a bin bjya I think.then loaded the od xdf.I was going threw it changing things I know to change.initial timing to 10° and a few of the things it said to set for pfi.my question is the main spark.I looked at the main spark for ns1 xdf.I dont know if that us even a 4.5L bin or if its n*.quite different. Do I cut and paste the spark table or copy the parameternal and delete the one that was there.I'm just trying to make the changes I think are needed and figure out how to post my data logs and xdf so u or someone could tell me if I'm doing the right things or if I'm not.I'm unsure if I have the correct info for 4.5 settings but I am more so wanting to know.is that the way one would for example swap a timing table and initial to run a different engine on an ecm mentioned for truck.thanks