First, I did not see a forum section for this so placing here due to year.
I am going to buy hptuners soon.. few things on ebay....
My question..I swapped an 8.1L into my squarebody, had a guy rework the harness and do a hot tune. Finally swap done and she runs awesome when cold. When she hits 180ish and up.. chockes, stumbles and back fires...robbed of power.
Could this be due to a 'hot tune' someone is guessing at or something else?
no engine codes
have 2 upstream 02s
egr delete
have maf, crank and cam sensors...
thoughts?