I have a 1999 Chevy Blazer ls.
I have a rattling noise coming from my exhaust . Also I smell sulfur. The engine seems to be missing. When I but it in reverse the rearend shakes. This just started this morning. Please can anyone help

 

Got any codes for your cat?

I bet the cat has broken, and the pieces are in the muffler. Explains the sulfur smell

 

What about the rearend shaking in reverse and the engine missfire.

 

All can be caused by a bad cat

 

I thought it could.be a rear end problem.

 

Any check engine lights?

The rear end shake could be a different problem, but let's narrow down if you got a bad cat or not

 

Yes ,the check engine light is on. Put it on a micro mechanic. It's junk.
I don't get paid untill Friday. I'll let you know.

 

I have had owned another blazer that had the same rattle. But it had no performance issues. Of course I had that one fixed as soon as I heard the rattle.
I let this rattle go for about a 1000 miles. I'm taking to my cheap exhaust mechanic first thing Friday. I really hope it's the catylitic converter that's causing these issues.

 

Most auto part stores will read the codes for free ......

 

Would I do any damage to "the blazer"
If I drove her to AutoZone with a busted cat.