not much car gets loud. If its a newer car may bring lights of check engine soon on. And may affect fuel milage.
There's no possible way to pass inspection with a bad catalytic converter, if if you find out you have a bad catalytic converter during your inspection you have a chance after you after you have replaced the catalytic converter and the inspection no no charge/free!!
No, the catalytic converter is downstream from the EGR valve so it has no effect on it.
A bad coil can damage a converter. If the engine is misfiring, it will cause raw fuel to get into the converter and that can cause failure.
Transmission torque converter or an exhuast catalytic converter?
A bad catalytic converter can cause hard starts if it has become clogged. This produces excessive back pressure in the engine.
Yes. If a coil is bad causing one or more cylinders to not fire, this allows raw unburned fuel to enter the catalytic converter, where it is burned. This can ruin a converter.
A bad catalytic converter will cause a severely restricted exhaust system. You would notice a lack of power and performance from you vehicle and in cases of a completely blocked converter, the engine may not run.
Yes it is possible.
No.
Yes it does.
They can become clogged or they can burn out.
Check engine light will come on due to bad readings from oxygen sensor after cat