Catalytic removal
#1
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Catalytic removal
Hi,
I’ve got a quick question. I’ve got a 1988 4runner and think my cat might be plugged up, so I was just curious if I could just remove it. I have never removed a cat from an EFI engine; I figure it should be fine, just wanted to know for sure.
Thanks,
Jake
I’ve got a quick question. I’ve got a 1988 4runner and think my cat might be plugged up, so I was just curious if I could just remove it. I have never removed a cat from an EFI engine; I figure it should be fine, just wanted to know for sure.
Thanks,
Jake
#2
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Yes you can, but you will find (search and see) that most people dont like their cats gone. I did mine and all it did was stink, horribly. IMO get a carsound (magnaflow) replacment...
but to answer your original question, it wont affect your EFI at all.
but to answer your original question, it wont affect your EFI at all.
#3
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running a straight pipe is just annoying...i think you get a much better sound and smell out of a magnaflow highflow. if your in the market hit up cootees with a pm. he hooked me up with one in 2 days....
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Please don't run without a converter. That stuff up there , in the air that causes athsma, etc. (smog) is caused by the crap coming out of YOUR (and my) exhaust. Running without a catalytic converter is like driving 20 cars from the 1970s. We all make polution, why add to it unecessarily. That whole tread lightly bit includes the air.
Sorry for the rant, but there it is.
Sorry for the rant, but there it is.
#5
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It affected mine. I suspect it caused the 02 sensor to report faulty readings, therefore causing my idle to fluctuate between normal and lower than normal. Sometimes I thought the engine was gonna die. I put a Carsound cat on, and it fixed the idle issue, and I noticed no performance loss from it. I actually gained some low end torque without sacrificing high end HP.
Plus, it's horrible for the environment. Don't hack it off.
Plus, it's horrible for the environment. Don't hack it off.
#6
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Originally Posted by Churnd
It affected mine. I suspect it caused the 02 sensor to report faulty readings, therefore causing my idle to fluctuate between normal and lower than normal. Sometimes I thought the engine was gonna die. I put a Carsound cat on, and it fixed the idle issue, and I noticed no performance loss from it. I actually gained some low end torque without sacrificing high end HP.
Plus, it's horrible for the environment. Don't hack it off.
Plus, it's horrible for the environment. Don't hack it off.
#7
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Originally Posted by Bumpin' Yota
Well the O2 sensor is actually upstream of the cat so it shouldnt alter the readings of it...
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I bought a chepo cat at advanced auto for about $99. It was a direct fit and works fine. I could not pass inspection with my old one ewven though it still performed fine.
#12
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i don't mean to be liberal ( b/c i sure as hell am not) but i'd have to agree that its time to actually start thinking about pollution control. after living in the bay area, ca for the past 19 yrs, the smog has definitely gotten more and more noticable. before now i always thought it was such trash how ca smogs cars, but now i realize it's a good thing...
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I ran my turbo Eclipse cat-free for performance reasons but on a NA engine the gains are so insignificant it's not worth the trouble of adding pollution;my Eclipse also only saw about 5000 miles a year and was primarily a track car.
#17
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Originally Posted by tom renzoni
so you shouldnt run without a cat on a turbo?
But with a turbo you cannot reduce backpressure post turbine enough! Lowering backpressure behind that turbine severely lowers EGTs which help save yer engine. If I do turbo my yota ill be pulling the cat or getting a huge arse cat that will provide zero restriction. Until then im keeping my carsound Hi Flow cat!
#18
Originally Posted by Bumpin' Yota
Well the O2 sensor is actually upstream of the cat so it shouldnt alter the readings of it...
I agree with others, it is best to run a cat on a daily-driven vehicle. Carsound is the way to go.
Last edited by rimpainter.com; 07-28-2006 at 03:42 PM.
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