97 died with 02 sensor "adjustment"
06-08-2011, 04:05 PM
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Model: Cherokee
97 died with 02 sensor "adjustment"
My 97 Grand Cherokee with 253,000miles, exhaust fell off yesterday. It rusted off at the cat, and the cat would have to be replaced. Took the jeep down the road and was happy with it. The check engine light came on obviously because i removed the o2 sensor. So i figured i would trick it and cut the wires to the old one plug it in and find the right wire connections to shut off the check engine. Well just as i plugged it in, it died. And will not start. So i reset it back to zero without the plug in it, and still wouldnt start. I checked with my obd2 and now i can not connect with the vehicle. tried resetting everything by disconnecting the battery.... still no start, and no recognition of the computer.... Did i fry my computer? is there a way i can test it? And i am getting no spark into the distributor.
Thanks for your help, I searched the forums and didnt see anything but if there is im sorry i missed it.
Thanks for your help, I searched the forums and didnt see anything but if there is im sorry i missed it.
Last edited by JeepingDan; 06-08-2011 at 04:41 PM.
06-08-2011, 04:28 PM
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Year: 1989 2 door
Model: Cherokee
Engine: 4.0
Forum rules state that you can not talk about illegal activities on the forum. Running no CAT is illegal! this thread will be shut down so open up a new thread & just ask about the O2 electrical problem!
Please read https://www.cherokeeforum.com/f8/ann...rum-com-rules/
Please read https://www.cherokeeforum.com/f8/ann...rum-com-rules/
06-08-2011, 04:45 PM
#5
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I removed the talk of cat removal in your post.
Read the rules before posting or posting privileges will be taken away.
Read the rules before posting or posting privileges will be taken away.
Catalytic Converter Laws
Rules for Replacing Converters
In 1986, the U.S. Environmental Protection Agency issued new guidelines for the construction, efficiency and installation of aftermarket catalytic converters. All CleanAir converters listed in this catalog have been designed, tested and manufactured to meet this policy.
In addition, CleanAir converter listed in this catalog is appropriate for use under the current requirements of the California Air Resources Board (C.A.R.B.).
E.P.A. guidelines state that replacement converters may be installed only in the following situations:
1. The vehicle is missing a converter
2. A state or local inspection program has determined that the existing converter needs replacement
3. Vehicles manufactured prior to 1996 must have more than 50,000 miles, and a legitimate need for replacement must be established and documented
4. In cases of OBD Il-equipped vehicles (1996 and later), the O.E. manufacturer's 8-year/80,000-mile warranty must have expired and a legitimate need for replacement must be established and documented.
Please note that Federal law prohibits removal or replacement of a properly functioning O.E. converter.
When replacement of the converter is appropriate (as outlined above), the E.P.A. further requires that:
1. It be installed in the same location as the original
2. It be the same type as the original (i.e., two-way, three-way, three-way plus air/three-way plus oxidation)
3. It be the proper model for the vehicle application as determined and specified by the manufacturer
4. It be properly connected to any existing air injection components on the vehicle
5. It be installed with any other required converter for a particular application
6. It be accompanied by a warranty information card to be completed by the installer.
http://www.catalyticconverter.org/law/
* This is the start to a Catalytic Converter information post*
Rules for Replacing Converters
In 1986, the U.S. Environmental Protection Agency issued new guidelines for the construction, efficiency and installation of aftermarket catalytic converters. All CleanAir converters listed in this catalog have been designed, tested and manufactured to meet this policy.
In addition, CleanAir converter listed in this catalog is appropriate for use under the current requirements of the California Air Resources Board (C.A.R.B.).
E.P.A. guidelines state that replacement converters may be installed only in the following situations:
1. The vehicle is missing a converter
2. A state or local inspection program has determined that the existing converter needs replacement
3. Vehicles manufactured prior to 1996 must have more than 50,000 miles, and a legitimate need for replacement must be established and documented
4. In cases of OBD Il-equipped vehicles (1996 and later), the O.E. manufacturer's 8-year/80,000-mile warranty must have expired and a legitimate need for replacement must be established and documented.
Please note that Federal law prohibits removal or replacement of a properly functioning O.E. converter.
When replacement of the converter is appropriate (as outlined above), the E.P.A. further requires that:
1. It be installed in the same location as the original
2. It be the same type as the original (i.e., two-way, three-way, three-way plus air/three-way plus oxidation)
3. It be the proper model for the vehicle application as determined and specified by the manufacturer
4. It be properly connected to any existing air injection components on the vehicle
5. It be installed with any other required converter for a particular application
6. It be accompanied by a warranty information card to be completed by the installer.
http://www.catalyticconverter.org/law/
* This is the start to a Catalytic Converter information post*
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06-08-2011, 06:24 PM
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Model: Cherokee
hmm... wonder why the cat removal stuff is left out?.. i might have to read up on the procedure soon myself since the exhaust system on my jeep is origional, and will most likely need a new cat and muffler
06-09-2011, 05:52 AM
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06-10-2011, 11:22 AM
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Yup pretty sure thats what happened. I found a short in the wiring harness to the 02 sensor as well.. and when the computer gets hit with 12.5+v and its only supposed to receive .5milla v then i assume thats the end of its long and joyous life.