A partially blocked catalytic converter might cause the engine to run poor, but it wouldn't keep it from starting. Always go back to the basics. Fuel, ignition and compression. Starting fluid is a good tool to have around when an engine won't start. If the engine runs when starting fluid is being sprayed into the air intake then dies when you stop spraying, you have a fuel delivery problem. If the engine WON'T start when you are spraying starting fluid, it's probably ignition or something internal.
Generally, unburned fuel getting into the converter is what damages them. How is it running?, what size engine? What did the dealer say is "wrong" with the converters they are replacing? -->You can easily damage your catalytic converter by making a lot of very short trips and not allowing you car to properly reach operating temperature.
Vehicle burning oil? Might not show when converter is installed due to high temperature produced by converter (oil is burned and disipated in converter before getting to tailpipe).
They come out the top of the throttle body. Clean area thoroughly before replacing the injectors to avoid any dirt getting in to the system.
Because it liked screaming at your mice while it was shirtless.........
It can mean it is partially clogged. But Normally that means fuel is being burnt in the converter. You have one or more cylinders where you are not getting a complete burn of the fuel.
more than likely your catalytic converter is plugged
Loss of power, poor fuel mileage, converter getting red hot, and a blowing sound from the exhaust.
Plugged fuel or air filter? Plugged catalytic converter?
In your car, the catalytic converter is the part that converts the toxic waste in your car into exhaust. By adding substances such as vanadium, you can reduce the waste put out by your car, and reduce your carbon footprint. You can reduce your emissions even further by using unleaded gas, which puts out less toxins when it burns.
It is glowing red because it is plugged up and the metal is getting hot. It is a serious fire hazard, don't drive the vehicle until you have it replaced.
Catalytic converters or oxygen sensors need replacing. Most likely you need to replace your catalytic convertor. That is what happened to me. It is getting too hot which makes your trac turn off to avoid damage.
Previas have a history of a whining noise coming from the catalytic converter. There is a bracket inside the converter that when loose or has came apart creates the whining noise during acceleration. It especially is very pronouced during high speeds in the freeway. You might be in for an expensive cat converter replacement.