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Old 06-28-2006, 08:10 AM   #1
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Need to Disconnect Check Engine Light

I have removed the catalytic converter on my 97 Wrangler and now my CEL stays on constantly. I'm not going to put a high flow cat on, so I was wondering if anybody knows how I can disconnect the CEL completely. Thanks in advance.

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Old 06-28-2006, 08:15 AM   #2
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hope you like bad gas mileage

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Old 06-29-2006, 07:14 PM   #3
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Hmm...just cut the cat off mine, and running 36s and my mileage improved...still runnin 15-17 on the highway.
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Old 06-30-2006, 08:41 AM   #4
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Quote:
Originally Posted by Mudweiser
Hmm...just cut the cat off mine, and running 36s and my mileage improved...still runnin 15-17 on the highway.
.....and all future generations thank you for the additional pollutants you're pumping into the air!
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Old 06-30-2006, 09:11 AM   #5
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Oh im sorry...i dont live the most polluted state in the country....and i can see the stars at night for lack of smog. Shame on me for being a country boy...and not givin a dayum~ :hug:
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Old 06-30-2006, 10:02 AM   #6
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A Cat is somewhat restrictive to the exhaust flow, but a good high flow muffler system will work just as well as removing the Cat. Most of the newer engines will not perform correctly without the Cat being in place, as there is a 02 sensor located on the Cat, or just past it. Most states, excluding some southern ones, will not pass inspection with your CEL on.
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Old 06-30-2006, 10:09 AM   #7
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Quote:
Originally Posted by Mudweiser
Oh im sorry...i dont live the most polluted state in the country....and i can see the stars at night for lack of smog. Shame on me for being a country boy...and not givin a dayum~ :hug:
Because of where you live, the trade winds keep your area fairly clean, and pass all of your pollutants up into the Northeastern states. That is why New England has so much acid rain, it is all blown up there, and dropped on them. Keeping our air clean is all of our responsibility, just not the ones that are stuck with the pollutants. Being "country", should not excuse one from being responsible.
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Old 06-30-2006, 10:29 AM   #8
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Cats are not that restrictive - not enough to justify removing them. The factory cats are already pretty high flow - couple that up with the fact that the diameter of the cat is about twice that of the exhaust tubing and it really just doesn't matter - we're driving our Jeeps, not dragging them. Cats don't exactly reduce the ammount of polution your Jeep makes, and I dont think give you improved fuel mileage since the downstream sensor does not control any fueling - just a monitor (though removing it might throw the computer into a failsafe), however - it does convert the most hazardous pollutants into a few that are less damaging to the environment.

Get a new cat if your old one was broken, and if it wasn't broken - what were you trying to pull off? In case you still have less than 80K on your Jeep; the cat, along with any other emissions related equipment is still under warranty as required by law. Removing emissions equipment, along with loud exhaust, hammerheads, drinking while wheeling, throwing out trash on the trail, and many others, is one of the many things that gives four wheelers a bad name; not to mention the potent smell that catless (or cat-damaged) rigs put out is just obnoxious on the trail.

With that said - it's easy enough to wire up a simple circuit that will bypass/simulate the downstream secondary sensor with a quick trip to radioshack or other electronics stores.... but I'm not gonna post it As said earlier - some states might pass you with the CEL on; however NONE will pass you through inspection catless as federal law requires a catalytic converter to be in place.

My Jeep is registered outside of Tucson city limits and does not have to go through emissions inspection - there was a time when I thought it was cool to remove it and get away with it; but since then (a few years ago) I have re-isntalled and repaired all my emissions stuff on my own terms. A clean running rig is a happy rig
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Old 06-30-2006, 12:59 PM   #9
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Ahmen to the choir. This earth and all we do to it belongs to ALL of us! **Steps off soap box**
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Old 07-01-2006, 03:47 PM   #10
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Ahh well. on my 01 there is no o2 sensor on the cat or near it..it has 4 o2 sensors near the manifold...but nothing in the rear of the exhaust system. But with a super 40 and no cat...its as close to a v8 rumble as you can get lol. Hug a tree or sumfin.

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