First, I would expect the VSS they installed should still be under warranty. So contact them about that. As far as the lack of power, one of the most common problems is a plugged catylatic converter. When driving, if it plugs, it will cause a change in engine sound and also a reduction in power. I would have that checked.
Just for the heck of it, is the check engine light coming on? If it is, take it to a nationally recognized parts store and have them scan the computer for codes. Let me know what they are. If could just identify the VSS again, or there could be other codes and I need to know what they are.
Try that and let me know what you find. Also, most parts stores will do it for free, so there shouldn't be any additional money out of pocket for you.
Monday, October 12th, 2009 AT 9:44 PM