I have a 98 Mystique with an SVT throttle body. When I'm accelerating it feels like someone stuck a rag in the intake when I reach around 4000 RPM, with a noticeable power loss. It does not do this in cooler weather (below 65 degrees or so).
Although I have a KKM cone filter and I'm aware of heat soak issues I was running the same filter with my old stock throttle body for over a year and I never noticed the problem. I don't think it's related to the cat, since I installed MSDS headers this past winter and a new, high-flow cat.
Any ideas?
Jeff
