Hi im new to tuning have a 99 5.3 swap in my 84 cutlass 2.5 exhaust tss 216/220 500. lift cam 2800 stall 4l603 mail order tune here is the issue car starts and runs when up to temp if you crack the throttle in park it stalls also have to feather it in gear a bit other than that it runs good I was wondering if there is a small change I can handle like I said new to the tuning end of it and want to learn I did send the data logs back to the tuner waiting for the changes but figure try here first or get some input with whats wrong
thank you