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Gut Cat Converter?

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Old Jun 15, 2011 | 05:40 PM
  #1  
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Gut Cat Converter?

Hi , this is my first time here. I recently bought an MIL Eliminator because at last inspection (August) my mechanic said I would need new cat converter to pass emissions. A friend told me about the MIL Eliminator and advised to me to empty/ gut the converter for better gas mileage. I asked my mechanic about it and he said to do more research because I might lose "back pressure" and have additional problems ie: EGR Valve. He's fine with the MIL. Has anyone ever gutted their Cat? I have a 1999 F-150 4.6 Liter. Any help appreciated.
Mike
 
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Old Jun 15, 2011 | 06:05 PM
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From: Nixa
The guy at my local muffler shop gutted the cat on my 93. My truck had got to the point that it wouldn't even run, because the cat was so plugged up.
So that being said I can't really tell you if it had any benefits to doing it, as I don't really have anything to compare it to. From all early recollections of when I bought the truck. I can only say i think I got a bit more horse power, and possibly a bit better milage, but I can still watch the guage moving to empty as I drive. lol
 
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Old Jun 16, 2011 | 08:53 AM
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cat's plugged on my chev I'm hacking it out soon.
 
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Old Jun 16, 2011 | 09:21 AM
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for some reason they seem to eventually fall off of the late model stuff i drive . i'll be da^*ed if i know why ...........................
 
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Old Jun 16, 2011 | 01:33 PM
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Originally Posted by mikeanddessa
Hi , this is my first time here. I recently bought an MIL Eliminator because at last inspection (August) my mechanic said I would need new cat converter to pass emissions. A friend told me about the MIL Eliminator and advised to me to empty/ gut the converter for better gas mileage. I asked my mechanic about it and he said to do more research because I might lose "back pressure" and have additional problems ie: EGR Valve. He's fine with the MIL. Has anyone ever gutted their Cat? I have a 1999 F-150 4.6 Liter. Any help appreciated.
Mike

OK, if you are going to need a new cat to pass emissions, how will you pass with a gutted one? Why did he say you will need a new one? If you have a sniffer test, it will never pass without a cat.

You won't be able to tell any difference with a gutted cat vs. one working properly.
 
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Old Jun 16, 2011 | 04:15 PM
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REply to "gut cat converter?"

There is no sniff test anymore, it's strictly the computer. MIL Eliminator will take care of that. It came in the mail today... again my question is will it negatively affect another part of the truck because of lack of back pressure.
 
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Old Jun 17, 2011 | 10:35 AM
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If the cat is bad then gut it to prevent problems down the line. It will not adversly the engine or its performance.
 
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Old Jun 18, 2011 | 08:44 AM
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Gut Cat converter?

Thanks Lazy K, MY MECHANIC WAS CONCERNED IT MIGHT AFFECT SOMETHING BECAUSE OF THE LACK OF BACK PRESSURE IE: EGR VALVE
MIKE
 
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