Hard to start, loss of power, poor fuel mileage.
The engine will have NO POWER and will not want to start or even run.
Could be several things but one comes to mind, a plugged catyletic (sp?) converter.
Dirty injectors, air filter cloged, spark plugs need changed, catyletic converter stoped up
I dont believe it will if the converter is cracked but if the converter is plugged it definetly will.
Nothing
You replace it.
Yes, if it is plugged the exhaust can't get out of the engine.
Plugged fuel filter? Plugged air filter? Plugged catalytic converter?
You will fail an emission test and worse case, the engine will fail to run if the cat gets plugged up.
Plugged fuel/air filter? Plugged catalytic converter?
Could be a plugged catalytic converter, plugged fuel filter,
Plugged air filter? Plugged fuel filter? Plugged catalytic converter?