This may be a stupid question, but well I want to be sure this is the root cause before I drop any cash on a new muffler (rather than take my chances with gas vapors and just weld it back together). I just bought a '88 TC and have noticed that the driver side muffler end cap has been partial torn off and hammered back into shape (on the input end). Now there is a slight gap extending halfway around the front of the muffler. The problems I've noticed is that there is a bad rattle whenever I take my foot off the gas pedal, but as soon as I put the pedal down even a slight bit the rattle goes away. Also I cant hit above 5psi boost. Would these symptoms be caused by this "broken" muffler? or are there more problems that I'm not thinking of? I still have alot of other things to go over before I even plan on getting it inspected, but I want to take care of this rattling problem first as it is very anonying.