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What are the symptoms and causes of a cloged catalytic converter

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Symptoms are rough running, stalling, poor gas mileage, and especially a strong smell of rotten eggs (sulfuric acid). The main cause is old age, but poor/cheap/contaminated fuel can also be a contributing factor.

Bill B

Posted on May 07, 2010

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Clogged cat. causes low power, no acceleration, may cause overheating, loss vacuum intake pressure, bad fuel milage, easy to check diconnect the front pipe and try it out,usually caused by fuel contamination,engine running rich, overheating and collapseof the core, or just plain old age

Posted on May 07, 2010

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Where is the obd port located on my 2002 Toyota Camry and how do I flash the computer after replacing catalytic converter (updated catalytic converter)


To the right of steering wheel under dash white plug also
replaceo2semsor-aswell pull the o2 sensor and see howmuch
the converter is cloged o2semsor out turn on car feel the hole the sensor came out

Sep 27, 2014 | 2002 Toyota Camry

1 Answer

Failed asm emission test


Improper Ignition Timing

Defective Ignition Components
(ignition coil/s, distributor*, distributor cap*, distributor rotor*, ignition wires, and spark plugs - NOTE:*Distributor-less engines do not have these components)

Lean Fuel Mixture

Defective Catalytic Converter
(Some symptoms of a bad catalytic converter:
Major loss of power over 15-25 mph.(does this speed sound familiar to you?)
Strong sulfer or rotten egg smell emitting from the exhaust.
Loud rattle being heard from inside the catalytic converter.

Defective Air Injection Components

Faulty smog pump if fitted.

Low Cylinder Compression.

Aug 26, 2014 | Cars & Trucks

1 Answer

1990 isuzu trooper 2 v6 auto poor fuel economy,poor power, oor acceleration,runs like top no oil consumption, whaaaaats wrong please help ?


Check for the catalytic converter being plugged up. The powertrain is actually from GM, and it uses TBI. A plugged catalytic converter will cause all of your symptoms, and yet not trigger a MIL warning light.

Mar 13, 2014 | Cars & Trucks

1 Answer

Loss of power check engine light


is the check engine light on ! if so it may be a clogged up convertor. here is the symtoms, A clogged catalytic converter reduces the flow of a vehicle's exhaust by creating a constricted and/or blocked exhaust channel, which engine exhaust gases flow through on their way out of a vehicle's tail pipe. By reducing the flow of exiting engine exhaust gases, a condition that creates an increase in engine exhaust back pressure (thereby reducing engine efficiency), a clogged catalytic converter results in a small reduction in engine horsepower. A clogged catalytic converter causes a reduction in vehicle gas mileage.
Fumes leaving exhaust is sulfurous as if it is coming from a rotten-egg is one of the unmistakable clogged catalytic converter symptoms. good-day !



Nov 09, 2011 | Cars & Trucks

2 Answers

Will a cloged or bad cat converter cause my car to stall and make rpms jump before stalling


Clogged catalytic converters act like plugged exhausts. It will cause loss of power.

Jun 04, 2011 | 2001 Pontiac Montana

1 Answer

My check engine light came on with P0422 and P0455 codes. Any suggestions as to the cause.


P0422 - Catalyst below threshold.

Catalytic converter is clogged or out of medium.

Replace it.


ACTUAL DIAGNOSTIC:

Fault Code Definition
Code P0422 indicates that the Bank 1 Main Catalytic Converter's emissions efficiency has fallen below the minimum allowable limit. This threshold is tracked by a Catalyst Monitoring Oxygen Sensor located on or near the outlet of the Catalytic Converter.

Symptoms

* Check Engine Light will illuminate
* In many cases, no abnormal symptoms may be noticed

Common Problems That Trigger the P0422 Code

* Defective Catalytic Converter
* Engine misfires have damaged the Catalytic Converter
* Internal engine damage resulting in high oil consumption and/or a leaking Head gasket has damaged the Catalytic Converter

Common Misdiagnoses

* Oxygen Sensors are replaced when the real problem is a damaged Catalyst
* Catalyst is replaced when the real problem is internal engine damage, which is producing elevated emissions levels
* Catalyst is replaced when a misfiring engine is the real problem



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Aug 04, 2010 | 2008 Saturn VUE

2 Answers

Jetta temp sensor related to other codes?


P0422 - Catalyst below threshold.

Catalytic converter is clogged or out of medium.

Replace it.


ACTUAL DIAGNOSTIC:

Fault Code Definition
Code P0422 indicates that the Bank 1 Main Catalytic Converter's emissions efficiency has fallen below the minimum allowable limit. This threshold is tracked by a Catalyst Monitoring Oxygen Sensor located on or near the outlet of the Catalytic Converter.

Symptoms

* Check Engine Light will illuminate
* In many cases, no abnormal symptoms may be noticed

Common Problems That Trigger the P0422 Code

* Defective Catalytic Converter
* Engine misfires have damaged the Catalytic Converter
* Internal engine damage resulting in high oil consumption and/or a leaking Head gasket has damaged the Catalytic Converter

Common Misdiagnoses

* Oxygen Sensors are replaced when the real problem is a damaged Catalyst
* Catalyst is replaced when the real problem is internal engine damage, which is producing elevated emissions levels
* Catalyst is replaced when a misfiring engine is the real problem



Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.!@##

Jul 11, 2009 | 1999 Volkswagen New Jetta

1 Answer

1990 toyota pick up


Hi this sounds like cloged fuel filter or cloged ingection sistem ,

Aug 31, 2008 | Toyota Pickup Cars & Trucks

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