[jobu]

We had this happen to our truck when I was a kid. The exhaust pipe was packed from the catalytic converter back through the muffler. It took a bit to figure out what was going on and then I had to get under and cut holes in the exhaust pipe in a couple places until I found clear pipe.

After that we started putting soup cans over the exhaust pipes if they were going to sit more than a day or two.