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post #1 of 16 Old 04-20-2009, 12:10 PM Thread Starter
gene97sport
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oxygen sensor question..

alright.. my 97 from what i was told has a 98 ZJ grand cherokee 4.0 engine . now the part number for both models are different. should i go ahead with a ZJ oxygen sensor? would the plug fit? http://www.quadratec.com/products/52449_0286.htm or order a 97 TJ sensor which is a different part number. also.. are the computers the same for the both? if not, should it have one from a ZJ? thanks getting terrible mileage

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post #2 of 16 Old 04-20-2009, 12:14 PM
Wheelin98TJ
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All your wiring harness should still be TJ, so you would need a TJ 02 sensor.

If you can post a picture, this can be verified. Post a picture under the hood and another showing the upstream 02 sensor.
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post #3 of 16 Old 04-20-2009, 12:19 PM
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If the engine swap was done correctly all the necessary TJ parts and engine accesories were installed on the ZJ block. Your Jeep, and your computer, don't know and can't tell the difference what block is installed. Order the correct parts for the make, model and year of Jeep you own.

I would buy an O2 sensor from a local parts store so I can compare the sensor and plug before I buy it.

You may even find that more than one model of Jeep uses the exact same O2 sensors.

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post #4 of 16 Old 04-20-2009, 12:33 PM Thread Starter
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post #5 of 16 Old 04-20-2009, 12:43 PM Thread Starter
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just took the pics. right now it has the 97 TJ bosch sensor with the plug. reading up that bosch isn't the way to go and with the error code 21 i'm getting

(Upstream oxygen sensor response slower than minimum required switching frequency. Upstream oxygen sensor heating element circuit malfunction. Downstream oxygen sensor heating element circuit malfunction. Downstream oxygen sensor input voltage maintained above the normal operating range. Oxygen sensor voltage too low, tested after cold start. (Upstream or Downstream) Left oxygen sensor input voltage maintained above the normal operating temperature.)

should i replaced both up and downstream sensors?

Quote:
Originally Posted by CJ7-Tim View Post
If the engine swap was done correctly all the necessary TJ parts and engine accesories were installed on the ZJ block. Your Jeep, and your computer, don't know and can't tell the difference what block is installed. Order the correct parts for the make, model and year of Jeep you own.
makes sense
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post #6 of 16 Old 04-20-2009, 01:31 PM
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I would just do the upstream sensor.

I would also consider replacing your down pipe.

An easy way to do this is with a new cat, such as a high flow cat from Mangaflow. They sell a direct fit cat converter with pipe all the way to the header for around $100.

Someone replaced part of your down pipe and did a hack job. The 90 degree bend is killing your exhaust flow.
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post #7 of 16 Old 04-20-2009, 02:11 PM Thread Starter
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Quote:
Originally Posted by Wheelin98TJ View Post
I would just do the upstream sensor.

I would also consider replacing your down pipe.

An easy way to do this is with a new cat, such as a high flow cat from Mangaflow. They sell a direct fit cat converter with pipe all the way to the header for around $100.

Someone replaced part of your down pipe and did a hack job. The 90 degree bend is killing your exhaust flow.
i'll look into that right now! yea that 90 degree bend just didnt look right lol thanks for the help. if anyone has some links is to where to buy.. i'll try the google/ebay route.
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post #8 of 16 Old 04-20-2009, 02:16 PM
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Here is a link to the Magnaflow converter I was referring to:

http://www.quadratec.com/products/51410_101_07.htm

magnaflow-cat-converter.jpg
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post #9 of 16 Old 04-20-2009, 02:22 PM
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And I would get the 02 sensor from the dealer.

You can negotiate with them on their prices. If you can get it down to 10% over cost, you're doing good.
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post #10 of 16 Old 04-20-2009, 02:38 PM
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Quote:
Originally Posted by Wheelin98TJ View Post
And I would get the 02 sensor from the dealer.
www.rockauto.com has great prices on oem stuff.
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post #11 of 16 Old 04-20-2009, 02:40 PM Thread Starter
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yea, i was planning on getting the O2 sensor from the dealer. now the downpipe is included right? cause it only says Parts Included * Catalytic Converter on the quadratec site http://www.quadratec.com/products/51410_101_07.htm
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post #12 of 16 Old 04-20-2009, 02:44 PM Thread Starter
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Quote:
Originally Posted by jgorm View Post
www.rockauto.com has great prices on oem stuff.
yea, they have good prices
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post #13 of 16 Old 04-20-2009, 03:15 PM
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Originally Posted by gene97sport View Post
yea, they have good prices
from RA on my mustang forums for more discount.

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Just enter discount code: C0B2B01F848C in the “How Did You Hear About Us?” line of your shopping cart. This code expires 4/23/2009.
with o2 sensors ALWAYS use the OEM version. I can't even count how many people i know that have had issues with knock off o2 sensors.
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post #14 of 16 Old 04-20-2009, 04:01 PM Thread Starter
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http://www.quadratec.com/products/55120_10.htm
http://www.quadratec.com/products/55120_09.htm

quadratec has 2 type of sensors for the 97-00 model. are these OEM?
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post #15 of 16 Old 04-20-2009, 05:58 PM Thread Starter
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ok ordered oem sensors and the magnaflow setup
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