After I gave up on getting this to work in my C5, I tried to sell it to a guy with a C6, and we found that it had the same oscillation problem in his car that it had in my car. That was back in February 2022.

After I posted about that on Facebook, a guy from Williams Performance contacted me and offered to fix it, so I sent it in.

Williams Performance called me a few days later and said that the position sensor was defective, and they would be happy to replace it, but it would be a while because they were waiting on parts from a supplier.

Six months later, I asked what was up, and the only response was "wait, what's your name?" I gave it to them. They never got back to me.

A year after sending it in, I think I may have convinced them that I'm still waiting for a replacement for the $650 throttle body that I sent them... but I'm not certain of that.

I'm a little grumpy about this.