Just finished the Gen IV Tuning epic post from BigMike42. Really helped me to solve a problem I had with the engine stalling when dropping from P to R/D.
So one big issue left to solve. When I'm in gear and need to do a quick input to the accelerator (moving the car in a long red-light line, creeping over a speed bump or curb, wheel caught in a hole on a grass field, etc.) the engine takes the accelerator input just fine, but the engine will undershoot idle speed and die about 90% of the time (on that last 10%, it will finally catch it at very low rpm and shoot back with power to spare--need to keep a firm foot on the brake!). I've been fiddling with the Base Minimum Airflow table plus the Airflow Overspeed and Underspeed tables with no luck. I'm hesitant to play with anything else as I'm just getting my bearings with HPT.
For reference, I posted the tune and a log here showing two such stalls--the first one happens at 4:13 in the log. The engine is an LS3 crate motor with the ASA cam (note the low idle vacuum) and an Edelbrock blower. The trans is a 4L80e with a 2600 stall converter (advertised) controlled with a TCI TCU. There is no VSS input into this ECU so it thinks speed is always 0.
Would appreciate any suggestions. Is this an area where the Throttle Follower settings might come into play? I haven't been able to find enough info on those yet to really understand how each setting works--any pointers on that or links to pages or posts would be appreciated.
Many Thanks!