it will usually sputter or sometimes not run at all
These are the only two substances for which older cars have an legal limit on tailpipe emissions.
Normally, The engine will not start.
if the gills are clogged the fish will die with out cure
you could get carbon monoxide gas in the car....(deadly)
It gets clogged
uhhh you unclog it!
Yes, it happens when the catalytic coverter is clogged
it won't pump fuel.
Very normal. It is condensation. Very normal. It is condensation.
Most cars won't even run is the converter is clogged. Clogged converters can get very hot, maybe even start fires.