17 Sierra, 5.3, some idiotically giant cam somebody else installed. The TSP "BD" cam or something...Trims are dialed in +/- 2%, dropped VT down to meet my commanded idle, etc. and with throttle help it'll start and settle in to idle just fine. Truck purrs great. But this thing *WILL NOT* start without help from the throttle pedal. What am I missing? Note, I am only having an issue with start ups. The rest of the trucks performance seems ok.
Thanks