Cat converter
 

What happens if you unplug the senser on the catalytic converter. Do alarms, bells and whistles go off or is there just a light that goes off?

Light No bells or whistles.

Possible rough running and/or stalling...do to poor air fuel mixture...

He didn't ask if it would affect the vehicles running just if there was an alarm of some type.

Actually, it says "what happens if..."

So
http://www.basehead.org/files/shots/...out-smiley.jpg

If he only wants to know what warning will occur, the question should be "what warnings will happen if..."

:grin:

Later.

OK http://i288.photobucket.com/albums/l...c_facepalm.jpg You win!!

it would run fine, the 02 sensor he is describing only sets off a check engine light and the code will read something about catylitic efficiency.

why is this question being asked in the first place?

That's what I thought but my junk is so old and I haven't worked on a newer one for awhile so I thought that maybe WJC was right. Shoulda stood my ground. Thanks KTM

So my engine wont run crappy like that one dude said? it will just say check engine. Is there a way to get that light to turn off without reconnecting it?

Oh im just curious i was looking at it today and i wondered what it would do i havnt ever done anything with the cat so i no nothing

The check engine goes off and the truck runs a little rough. Mine bogged down when excellerating.

JohnB
Chicago
97 XJ

you shouldnt unplug the o2 without a simulator..running condition/fuel will be effected.

Okay new here and this is the main reason i joined... My Cherokee is no cats anymore and it is sputtering just a tad when i speed up everything else seems fine and i am hoping this is causing my problem..

My question is what simulator has been proven to work? I am skeptical of ebay products and that's all i have found... Anyone have links to quality simulators?

Help would be great!

We dont discuss running no catalytic converter here on CF.

https://www.cherokeeforum.com/f2/cat...er-laws-24337/

The downstream O2 sensor (after the cat) on our '98 XJ has been unscrewed and unplugged for 3 mos now. About the 3rd or 4th day the sensor was disconnected the check engine light came on. It still runs perfect.....zero, zip, nada performance issues even though the check engine light is on. Clear the code and the CEL will remain off another 3-4 days before reappearing. It's the upstream O2 sensor (before the cat) that reads rich/lean fuel mixture. With no downstream sensor and a 180F t-stat our XJ gets mid-teens mpg city (stop-n-go <40mph) and low 20's mpg highway (>65mph). Just run's like a top.:thumbsup: