cuttin off ur cats
11-02-2009, 08:39 PM
#3
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Location: seminole ok
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Year: 91
Model: Cherokee
Engine: 4.0
i live in no where ok i run headers with about 2 ft of exhaust till it gets to my 2 stage flows with a 3 inch dump under my 79 they don't car around here just need to no if it will mess up how it will run
11-02-2009, 08:45 PM
#5
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Year: 1999
Model: Cherokee
Engine: 4.0
well in some states if you dont need to go through emissions )like in mass. if your pre-1995) you technically dont need a cat and if its obd-II you will get a cel cause the second 02 sensor makes sure the cat. is doing its job but if your state requires you having it keep it because catalytic converters are a touchy subject especially on this site
11-02-2009, 08:46 PM
#6
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I honestly dont care what you do, if you cut the cat off its not gonna do anything, my 89 doesnt have an o2 sensor in the cat. If yours does then you might have a problem... Just a warning though, theyre gonna delete this thread: "OMG, THATS LIKE, SO ILLEGAL!!!" and all that crap.. Youll pry get a pm from a moderator too...
11-02-2009, 08:47 PM
#7
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Year: 91
Model: Cherokee
Engine: 4.0
don't have any emission checks in oklahoma and they have never bothered us b4 with anything just need to no how its goin to run
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11-02-2009, 08:49 PM
#8
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..if its obd-II you will get a cel cause the second 02 sensor makes sure the cat. is doing its job but if your state requires you having it keep it because catalytic converters are a touchy subject especially on this site
if you cut the cat off its not gonna do anything, my 89 doesnt have an o2 sensor in the cat. If yours does then you might have a problem...
11-02-2009, 08:53 PM
#9
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Year: 91
Model: Cherokee
Engine: 4.0
will i no on a 04 chevy with a 5.3 if u take ur cats off it with give u 15 rwh we have run it on the dyno whats the big deal with the cats in oklahoma people really don't care
11-02-2009, 08:58 PM
#11
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Year: 2000
Model: Cherokee
Engine: 4.0L HO
again...its against the law to remove emissions equipment that came on a vehicle. you may not have emissions testing in your state, but if you have a visual inspection they could notice its gone and you would be in a bit of trouble.
11-02-2009, 09:00 PM
#13
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Year: 94 XJ
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Engine: 4.0L
Catalytic converter removal is illegal and ANY thread on here about it will be closed and the OP will receive a suspension, 2-3 day IIRC.
11-02-2009, 09:02 PM
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Year: 1987
Model: Cherokee
Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
Here is the short version guys. I happen to know from personal experience that removing the CAT from a 91 XJ with the 4.0 motor will NOT cause it to throw any CEL codes...nor will it mess up the MPG. It is evidently against he law to remove it. I hope this answered your question and will prevent this thread from getting out ofhand andcausing meto delete it.
11-02-2009, 09:02 PM
#15
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Originally Posted by muddyhillbilly
Well, I know on an 04 Chevy with a 5.3 if you take your cats off it with give you 15 rwhp we have run it on the dyno. Whats the big deal with the cats in Oklahoma people really don't care.
We dont have emissions checks in Michigan either, but I still have the cat on my 89. Fifteen horsepower isnt a whole lot to be screwing with your emissions for...
Dylan