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Old 03-25-2013, 10:15 AM
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Originally Posted by salad
Normally the upstreams go first. On OBD-II XJs all O2s are used for setting the fuel mix. If all 4 of yours are original, then its time to replace all 4.

HOWEVER - it depends on what codes you've gotten. Replacing O2s won't fix a blown fuse for the heater circuit, or a shorted wire.
See, I was told the opposite. Top two are for air/fuel and bottom two are for emissions... just like most other cars driving around the U.S. Only problem is, none of the parts stores carry the downstream fronts, and I have to do 2 at a time due to monetary issues. So with that being said, I'm gonna do the upstreams for now.
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Old 03-25-2013, 10:19 AM
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Originally Posted by xj_maniac_newb
I honestly cant see any clip left..
It's on the left side. It's seized in there, and not very cooperative. Thanks for responding.
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Old 03-25-2013, 10:27 AM
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Originally Posted by cf1k1
See, I was told the opposite. Top two are for air/fuel and bottom two are for emissions... just like most other cars driving around the U.S. Only problem is, none of the parts stores carry the downstream fronts, and I have to do 2 at a time due to monetary issues. So with that being said, I'm gonna do the upstreams for now.
That's the description for OBD-II in general, however different manufacturers can interpret things differently. Chrysler used all O2s for setting fuel mix in our PCMs as well as monitoring catalyst efficiency. You can find this in the FSM on page 31 of the Fuel System section (14).
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Old 03-25-2013, 10:29 AM
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Originally Posted by salad

That's the description for OBD-II in general, however different manufacturers can interpret things differently. Chrysler used all O2s for setting fuel mix in our PCMs as well as monitoring catalyst efficiency. You can find this in the FSM on page 31 of the Fuel System section (14).
But if only two are out, and the upstreams are the ones to go, then I'm just gonna do them then go from there. Eventually, all 4 will get done
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Old 03-25-2013, 10:29 AM
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Originally Posted by Wizstyle
It's on the left side. It's seized in there, and not very cooperative. Thanks for responding.
I see it, try getting a flat tip screwdriver and hit it out or just break it apart.
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Old 03-25-2013, 10:36 AM
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Originally Posted by Cherokeekid4x4
I see it, try getting a flat tip screwdriver and hit it out or just break it apart.
I've tried whaling on it with a flat hear. Break it apart? How?
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Old 03-25-2013, 10:44 AM
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Originally Posted by Wizstyle

I've tried whaling on it with a flat hear. Break it apart? How?
Hit it more lol. Umm is it just stuck? Try spraying like pb blaster on it. Then give it another shot
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Old 03-25-2013, 10:51 AM
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Thanks. I've done the Pb blaster thing until my garage is hard to breathe in lol. Right now I'm heading to pick up another drive shaft from a craigslist part out. Wish me luck.
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Old 03-25-2013, 11:06 AM
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Originally Posted by cf1k1
But if only two are out, and the upstreams are the ones to go, then I'm just gonna do them then go from there. Eventually, all 4 will get done
Sure. I'd check the wiring and fuses first though if you've actually gotten codes. It would suck to fry brand new O2s because the wires had melted together.
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Old 03-25-2013, 11:15 AM
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Originally Posted by salad

Sure. I'd check the wiring and fuses first though if you've actually gotten codes. It would suck to fry brand new O2s because the wires had melted together.
That was the first thing I checked
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Old 03-25-2013, 11:33 AM
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Last question. Any trick to not burning the crap outta myself lol?
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Old 03-25-2013, 11:34 AM
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Originally Posted by cf1k1
Last question. Any trick to not burning the crap outta myself lol?
Man up and don't be stupid
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Old 03-25-2013, 11:36 AM
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EDIT: Stupid website blew up, double post
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Old 03-25-2013, 11:37 AM
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How much of PIA is it to change oil pan gasket while eng still in my 87 xj its a 4.0
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Old 03-25-2013, 11:55 AM
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Originally Posted by my89xj

Man up and don't be stupid
Burns... Good for the heart and soul. (Insert pic here of kissy face chicken) lol
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