I have a 96 mystique with a 2.5" exhaust. I have a glasspack that I got two years ago and I think it might have failed. I have posted many times about the performance of my car and it has gotten worse, I cant rev it past 3k rpms. I have replaced wires, plugs, O2, fuel filter, MAF, air filter, etc. There is a loud hissing sound coming from what seems that cat (Just around the bottom of the car in that area). Sounds like a sucking in of air but it could be blowing. But what I think it is now is that my glasspack failed, is this possible? And if it failed would it restrict the exhaust? The engine just basically seems to be getting choked when I try to rev it.
