I'm having some issues getting my SD tune up and going properly. I have the 3bar OS, running Speed Density only. The setup is on a turbocharged 5.3L. I have the rest of the tune pretty much worked out, except for after I flash or disconnect the battery, it's EXTREMELY hard to keep running. Until it sets the P0102/103 MAF error codes and goes to SD mode.
You have to jack around with the throttle to get the ECU to fault the MAF, then it runs just fine until you clear the DTC's via a reflash or battery disconnect. However, it will not fault the MAF by simply turning the key on and waiting. It starts up and runs for about 2 seconds, then goes lean. Any attempt to stab the throttle results in a small flare, then no fuel. If you jab the throttle multiple times it will set the DTC's and off you go. Rather embarassing though....
I have the P0102/3 DTC's set to 2-No Mil Light, with the SES enable box still checked if that matters.
I'm running a 2004 GTO Operating System as well.
Here's the exact problem i'm having, but the OP seems to have let the thread die....
http://www.hptuners.com/forum/showth...density+gto%22
Any help is greatly appreciated. I have attached the current tune file.