Your Converter Has Internal Melt-down. It Must Be Replaced.Your Car Could Catch On Fire.
It is illegal to remove a catalytic converter on any vehicle and carries a hefty fine if you are caught.
Probably a restricted exhaust problem.I'd bet it's your catalytic converter.
"How much is the cost of the Catalytic converter on a 1997 Nissan truck?"
where is the catalytic converter located bank 2 for 97 Nissan altima
Under the hood, on the passenger-side of the firewall, down low & just above the catalytic converter.
Contact a Nissan dealership.
Catalytic converter gone bad
You cannot unclog a converter. If it is clogged it much be replaced.
It is illegal to bypass the catalytic converter and besides your engine will not run correctly if you bypass or remove the converter.
Driver side
The cost is $500 - $700.
The location of the bank 1 catalytic converter on a 2005 Nissan quest is right next to the fire wall so its between the fire wall and the engine.