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> cat delete?
winc
post Aug 15 2012, 01:48 AM
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Deleting your catalytic converter WILL cause a CEL as it will make your oxygen sensor readings messed up, which will then cause your performance to be poorer and give you horrible fuel economy. They are crucial integral components for telling how much fuel gets fed to your engine.

The purpose of your first oxygen sensor is to tell the computer how much unburned fuel is coming out the exhaust... the second one tells how the converter is performing, both of which will effectively control your air/fuel ratio and advance or retard spark timing accordingly. Without the converters or oxygen sensors, it basically detunes your engine into a gas-sucking pig that runs like crap and drives even worse. Oh, that and a nice yellow warning light shining in your face while you drive it.



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silet
post Aug 15 2012, 07:21 AM
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QUOTE (Tyler @ Aug 15 2012, 12:53 AM) *
I was considering removing both the cats and resonator to lesson the restriction. But if it does make that much difference ill leave the first so I don't have to look at the cel lol


Tyler, your are not going to have a big improvement, even if you get both cats out. I can guarantee you that if do remove them, I would be faster at the quarter mile with my 05. And when your ECU decides it had enough, a moped will beat down the drag strip...


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Tyler
post Aug 15 2012, 05:04 PM
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Lol I sure am I glad I brought this up otherwise I woulda screwed myself for sure


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korea_senpai
post Aug 15 2012, 07:00 PM
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QUOTE (winc @ Aug 15 2012, 02:48 AM) *
Deleting your catalytic converter WILL cause a CEL as it will make your oxygen sensor readings messed up, which will then cause your performance to be poorer and give you horrible fuel economy. They are crucial integral components for telling how much fuel gets fed to your engine.

The purpose of your first oxygen sensor is to tell the computer how much unburned fuel is coming out the exhaust... the second one tells how the converter is performing, both of which will effectively control your air/fuel ratio and advance or retard spark timing accordingly. Without the converters or oxygen sensors, it basically detunes your engine into a gas-sucking pig that runs like crap and drives even worse. Oh, that and a nice yellow warning light shining in your face while you drive it.


I'll totally buy this for a $1. ^knows his stuff. Total consensus please don't do it.


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RyanLJS
post Feb 25 2015, 06:33 PM
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So I will have to replace my cat this summer even tho the car is 5 years old as the flanges have rusted away and literally metal is flaking off.. Depending on where the 2nd sensor is, say if its inbetween the 2 and you remove the 2nd cat will that throw a cel? As it would be a lot cheaper to add a section of pipe than buying another cat
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2000J25SP
post Feb 25 2015, 07:36 PM
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The 2nd cat can be removed with no cel. Also saves over 10lbs.
slowgls cat delete link


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kevinatfms
post Feb 27 2015, 11:39 AM
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Remove everything from the secondary catalytic converter back and replace with 2 1/4" piping and a good turbo style muffler.


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