[KingLT1]

If it's running that slow makes me wonder if the ECU is using the low octane spark tables. Put the original air filter back in, pull the negative battery cable for 30 min and reset the ECU, make sure you are using premium fuel.

There is some throttle lag on these cars with the stock tune, but it's nothing like you describe. If you put the pedal to the floor in sport mode, it should down shift quickly to the right gear and roll out. I was pulling 4.2 0-60 stock and 3.5 0-60 with mild bolt-ons and e85 tuned.