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Because too old or get damaged
If an engine is not tuned properly and allowed to run continuously, it can damage the cat by overheating and melting the catalyst inside causing an air restriction. The inside of the cat can also break up into pieces causing again an air restriction.
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∙ 11y ago
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Can a catalytic converter cause the EGR valve to go bad?
No, the catalytic converter is downstream from the EGR valve so it has no effect on it.
How does a catalytic converter go bad?
They can become clogged or they can burn out.
What causes the catalytic converter to go bad?
There can be a few reasons for a catalytic converter to go bad. One of the causes could be clogs. Other reasons include plugs not working right, and bad exhaust valves.
Can a bad catalytic converter damage the ignition coils or a bad ignition coil can cause to catalytic to go bad on a ford expedition?
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.
How can you pass inspection when you need a catalytic converter?
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!!
Will bad ignition coils cause the catalytic converter to heat up and go bad?
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.
Will a 2000 Jetta GLS pass a smog check if a catalytic converter goes bad?
the shop I go to said that my 2000 Jetta would not pass the smog check when the catalytic converter went bad.
Will a vacuum leak cause your catalytic converter go bad?
It is possible but highly unlikely.
Can bad engine timing make a catalytic converter go bad?
Yes, the unburnt fuel from poor timing will enter the converter and slowly destroy it.
How long should a catalytic converter last?
A catalytic converter should NEVER go bad unless something causes it such as a RICH or a LEAN condition. What is a "RICH OR A LEAN CONDITION"?
How do you know if a converter is bad on a Kia Rio?
Transmission torque converter or an exhuast catalytic converter?
Can a bad catalytic converter cause hard starts?
A bad catalytic converter can cause hard starts if it has become clogged. This produces excessive back pressure in the engine.
