 Clogged Catalytic Converter |
 May 19, 2012 - 4:30 PM
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Enthusiast  Joined Aug 28, '08 From Woolwich, Maine Currently Offline Reputation: 0 (0%)  |
Last summer the first catalytic converter melted and clogged the second one. I punched out the second and replaced the first one since that is the one with 2 oxygen sensors connected to it. Since I replaced the cat I've put about 20K miles on my car. The cat. melted and got clogged again.
Does anyone know any reason(s) why this is happening? -220K miles (2.2L) -Engine is running at normal temp, never over heats -Doesn't burn hardly any oil, maybe half a quart every 3,000 miles. -It is eating gas, though i think that was from the cat being clogged and it needing extra to keep the engine running under the increased back pressure from the clogged converter. Here is a pic of what it looked like before I punched it out today 
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May 24, 2012 - 9:51 AM
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Enthusiast Joined Aug 28, '08 From Woolwich, Maine Currently Offline Reputation: 0 (0%) |
QUOTE (Bitter @ May 20, 2012 - 9:06 PM)  you don't measure resistance, you watch the sensor switching which it won't if you're running rich. Check for high fuel pressure and see if you can borrow a scan tool to see what your long and short term fuel trims are. I don't think you have a MAF sensor. Does the engine ever stumble or stutter or run rough? That's classic engine misfire damage or just very very rich. The engine has only ever run rough at start a few times. All of which were after I didn't use the car for a few days and it rained a lot. But I comes right out of it within 500 ft of driving. Other than that I've never had idle issues. OBD I scan tools are almost impossible to find and far too expensive for me right now. Is there another way to measure the fuel pressure, other than with a scan tool? I should be able to measure an aspect of that sensor to see if it's working properly, whether it be resistance or voltage from the sensor. I just read some articles about O2 sensors and all but one said that the O2 sensor has a voltage that ecu uses to determine the mixture of the air and fuel. I'm going to assume that it's dead if I have no voltage from the sensor. Does anyone happen to know the voltage specs of the first O2 sensor? I'm guessing it's a slim chance of anyone knowing this This post has been edited by barterj: May 24, 2012 - 10:05 AM |
Posts in this topic
barterj Clogged Catalytic Converter May 19, 2012 - 4:30 PM
richee3 I'd guess that eating gas is the cause of the ... May 19, 2012 - 4:36 PM barterj The engine light has never been on. I just went ou... May 19, 2012 - 4:58 PM njccmd2002 call animal protective services, he keeps killing ... May 19, 2012 - 9:49 PM Special_Edy The extra fuel is not being burnt, it is going int... May 19, 2012 - 10:17 PM
Bitter QUOTE (Special_Edy @ May 19, 2012 - 10... May 20, 2012 - 12:34 AM barterj Thanks for the responses
Things I know aren't... May 20, 2012 - 6:30 PM stephen_lee Air intake, not gonna affect the afr enought to ca... May 20, 2012 - 8:03 PM barterj Thanks for that info stephen_lee. Now I get to fi... May 20, 2012 - 8:18 PM Bitter you don't measure resistance, you watch the se... May 20, 2012 - 9:06 PM mkernz22 you should invest in an A/F gauge. even if it is s... May 20, 2012 - 9:19 PM stephen_lee yea you dont measure resistance of the o2... and i... May 23, 2012 - 3:16 PM xrayjm I curious what your cat looked like from the exhau... May 23, 2012 - 6:55 PM stephen_lee id just replace it unless it already has been on t... May 24, 2012 - 6:47 PM Special_Edy Sometimes it doesnt hurt to bite the bullet and pa... May 24, 2012 - 11:12 PM |
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