I've worked on this some more. Basically I've disconnected or turned off EVERY component to do with the computer with the exception of the PSU and MoBo and I'm still getting horrible reception while the computer is running.
Here's an OLD thread where a couple of others have had the exact same problem....
Shielded antenna cable?
Unfortunately, there wasn't any intelligent response or resolution.
Your comment about something being in the car that doesn't belong there is correct.... it's the computer!
The closest I've gotten to any kind of success with troubleshooting this is when I took my computer from my truck and fired it up in my mini-van, which is also equipped with a Visteon HD tuner. The reception was much better than in my truck. This leads me to think that the antenna on my mini-van is better shielded, but I haven't had much luck figuring out where to get a GOOD shielded antenna for my truck. And, yes, the thought has crossed my mind to just take the antenna off the mini-van and install it on the truck. But this would be a poorly executed hack that leaves my mini-van with NO radio.
Has ANYONE else had any experience with poor radio reception due to interference from the computer?
Does anyone have a line on a good shielded antenna or a way to shield the computer case??
Thanks for any input anyone can offer...