Scotty i have a 1991 Toyota truck with a3.0 v6 the catalytic converter glows bright red and i smell unburnt gas is the converter plugged or is my truck running rich

more often that's leaking injectors or other problem putting raw gas into the cat and making it glow red. When clogged up, cats generally block flow and engine only runs at a slow speed. But of course, gas in the cat will eventually ruin the cat

If your tune up is current and complete, then you could try a fuel injection pressure cleaning service next.