My car sat for 20 days due to a work trip. I came back, it was dead. So I jumped it but when I turn the key to on. It flashed cat overheat light right away. I started it and ran really weird. When I pressed the gas it would sputter horribly. And when I tried to move if, black smoke came out of the exhaust. Could this all be due to a clogged catalytic converter or is this due to another issue? Thank you
-william