Originally posted by Winger:
Also, is it bad to take the engine over a certain rpm now. I just love the rush I feel after the engine hits 4,500 rpm and I don't want to miss that. Thanks
The TH fix is designed to stop the rpm's from hanging after shifting due to the PCM opening the IAC valve to help burn off the unburnt fuel.
It increases performance in no way.
The rush after 4500rpm is just the engine coming into it's main powerband.
