Re: Major problems
Wow, sorry you don't understand what happened.
You 'cannot' continue to 'force run' the motor under those conditions.
What you did was likely melt the cats.
This happens when cylinders missfire and pass raw gas to the cats where is burns so hot in melts them internally and blocks exhaust flow.
What you smelled was the cats heating at over 1200 degrees under the cab and overheating everything around it. 1200 degrees is a bright red color in daylight.
Now you need to use a Scanner to retreive the codes and repair things right.
If the cats are melted, you have a huge extra expense all caused by the original missfire trouble.
It's time to have a good shop do the repairs.
Good luck. Let us know how it all goes.