This doesn't sound too good, I really hope it's not the catalytic converter. Would a loose throttle cable also explain my symptoms?
The previous owner did drive the car with a busted air pump. The vacuum hose connected to the exhaust was busted as well, might have popped off due to back pressure caused by a clogged catalytic converter
. From paperwork provided by the previous owner has changed the spark plugs and fuel filter less than 10K miles ago. I'm also getting no fault codes except from the air pump which I fixed.