New to tuning. 2010 escalade, and having issues with cold start stumbling. Replaced, purge valve, vent tank, maf, tps sensor. When i replaced the tps sensor, cold start stumbling went away for about a week. This morning it started again. Wondering if there is an update or somthing i can do in hptuners to be able to update or rest the tps/throttle body. Anyone have this issue? Thanks