Hello All - I have a 2005 SRT6 Roadster with the following modifications: Larger crank pulley (ASP), NeedsWings single intake, Eurocharged tune, low temp thermostat, NeedsWings catch can and pulley saver kit. It is a fair weather car that has just under 13,000 miles on it. I am having a high and rough idle issue that is throwing me for a loop. Have left the battery disconnected for much time, performed many throttle body resets, etc. And the issue comes about whether the engine is hot or cold.
It started with a pull when stopped, say, at a stop light, where the throttle would go up to 1,500 or so. I replaced the intake manifold gaskets (with NeedsWings), and then it jumped to 1,500-3,000 RPM when started. I then replaced the CPS, though issue remained. Just replaced the throttle body with a new Bosch unit and issue remains.
Curious what thoughts may be. No problem going back to stock if needed. Other than a new intercooler pump a few years ago, there have been no other issues.

Thank you and I hope everyone is doing well during this time.