I've yet to actually get a symposer delete kit, but I read that you could unplug the wiring harness from it and accomplish mostly the same thing. However, after unplugging it and tying it out of the way, as soon as I started the car I noticed that my engine was making a chugging noise that was really only noticeable when the car was idling. Almost like a big diesel truck but quieter. I also didn't notice any less noise inside the cabin. Any ideas about what this could be? Is this what it sounds like you just REMOVE the symposer?