Exhaust Problem Part Ii

[mjscar]

Hey guys. A couple of month back I had a problem with my exhaust sounding like a tin can with a bunch of rocks in it. It ended up being the muffler being busted and so I got a new one put on. For a week there was no problem with the new muffler but now the muffler is going AWOL on me..... again!

For a starter, my new muffler gets louder as I drive along. What I mean by that is that when I got the muffler first put on, it sounded nice and smooth like it should any time, all of the time. Now, when I first drive my car, it sounds smooth like it was originally but as I get more and more into my journey, my exhaust gets louder, especially if I've given it some gas. Now obviously I thought there was a leak in my exhaust, like a hole somewhere on it, but then why wouldn't it just sound the same all of the time and not get louder only as I drive?

Secondly, after a trip on the freeway for approx. 3km or more sitting on 100, my exhaust starts to make a, I don't really know how to explain it, reverberating? sound. Like I can hear the exhaust reverberate more and more as I drive along on the freeway. Then when I finally get off the freeway and stop, when I take off again, there is this huge rattling/vibrating noise coming off my exhaust. But this noise and rattle/vibration ONLY comes after I've been on the freeway.

So what the crap is wrong with my exhaust!?!? I know I should take it back to the exhaust place, and I will, but I just need some help deducing what the hell the problem is because it's sort of hard to 'show' the guy what the problem is since it only happens on certain occasions.

Thanks for all your help!

BTW, I have checked the cat and it's still intact so thats not the problem.

[GODZ1LLA]

Build of up carbon generally makes a new exhaust sound louder and deeper....

[mjscar]

Build of up carbon generally makes a new exhaust sound louder and deeper....

So it's natural for my exhaust to do what I stated above? Because initially I thought oh it's probably the exhaust just wearing in a little and getting louder, but then what's with the freeway problem?

Cheers.

[GODZ1LLA]

Re-reading it have you checked the backbox to see if the honeycomb muffler bit inside isnt loose mine was and i just puttied it up....

But for the exhaust yeah its pretty normal to get louder (not silly loud just a differant tone) its just teh build up of crabon on fresh steel.

[mjscar]

Re-reading it have you checked the backbox to see if the honeycomb muffler bit inside isnt loose mine was and i just puttied it up....

But for the exhaust yeah its pretty normal to get louder (not silly loud just a differant tone) its just teh build up of crabon on fresh steel.

Well if the honeycomb inside the muffler is loose then I'm just going to go to the exhaust shop and demand a new one. It's only been on the car for 3 wks tops and if it's already loose, then it's obviously faulty.

Cheers.

Any other suggestion or ideas?