I am in need of a schooling on this one. I just recently started to run the SCT tuner from 5 star and it is earning its keep but I am hearing some interesting rattling when under a good load or giving her a workout going up the canyon. I honestly dont know a engine ping from an exhuast flutter. Can someone send some wisdom my way? I would hate to call mike for help if it is not related to the tuner

 

are you using the min required octane with the tune?
try running one grade higher and see if that helps.

After trying and you still hear it, I'd call Mike.

 

I am running the 91 performance octane tune. I dont have anything avaliable to me that is higher then 91. I will assume a call to mike might just be in order