Here are some guides to help you see what i am talking about please let us know what you find. Rougher idle than before.

Catalytic Converter Glowing Red Hot Youcanic

And 2 cylinders misfiring will dump a lot of unburned fuel into the exhaust and cats.

Catalytic converter glowing red hot and sputtering. And the p0420 is just saying the cats not working as it shaould how can it with all that raw fule in them. Now if you pour excessive hydrocarbons fuel in the exhaust the cat will burn that too and since. I brought it back and they replaced the ignition coils for cylenders 2 and 3.

This is not at all normal and means that your converter is very very hot. Symptoms in order of notice. I drove it again and still had the same problem.

Replacing the catalytic converter without finding out why it is getting hot and turning red is just a waste of money. That fixed the probem. It s probably fueling just fine but the ignition timing is way too late so the fuel is still burning while going out the exhaust manifold making the cats very hot.

Catalytic converter need regular maintained further small symptoms of a bad catalytic converter are. The cat is designed to burn the tiny amount of unburned fuel that comes from a normal engine. Check to make sure the air diverter valve is not stuck open because it sounds like it is allowing extra air into the exhaust system causing the catalytic converter to glow red hot.

A catalytic converter that is partially or fully clogged also referred to as plugged will get so hot that it will begin to glow. Check to make sure the control valve is not stuck open as well. A good technician will check the car s computer read the fault codes and.

My mechanic replaced the converter and an o2 sensor. A bad coil will cause the front 2 or the back 2 cylinders to misfire just like yours. An engine that is running too rich can also create excessive heat in the cat causing it to glow.

The unburned fuel can and apparently is burn up in the cats making them red hot. Reduced acceleration sluggish engine performance excessive heat under the vehicle dark exhaust smoke the smell of sulfur or rotten eggs from the exhaust. Slight smell of gasoline.

My car was sputtering and stalling and the catalytic converter was glowing red. If the catalytic converter is glowing red hot the first thing that most people think is that the catalytic itself is clogged but that is not always true. Glowing red catalytic converter after a few minutes referred to as glow melted baffling spewing out of exhaust caused by hammering to remove manifold much louder exhaust.

This is a common problem of severly retarded timing and i m sure they are looking at anything that could cause that like someone said above crank sensor cam sensor etc. We had seen cases when a mechanic changed the catalytic converter thinking that it was clogged because it glows red. Check engine light code for o2 sensor tests results.