hello everyone.
i am looking for guidance with my tune. specifically trying to correct a flashing engine light, not sure if it is a misfire, or backfire but while cruising on freeway, it makes a popping noise that has a loss of power feeling. also, slight grinding feeling when accelerating from a stop.
truck in question is 2009 gmc sierra 1500, 4x4 5.3 with truck norris nsr cam, afm/dod delete (plugs installed, and all 16 lifters are ls7)
ecu was bench tuned.
since cam install, had problems with loss of vacuum. to the point the truck would stall out, or go into limp mode.
had a new ecu bench tuned, it solved the staling out problem, but vac problem is still ongoing.
installed new : break booster, oil pressure sensor, maf sensor, spark plugs, ignition coils and wires
now i have purchased hp tuners to log data myself in an attempt to help solve my issues.
any guidance/ help is appreciated.