Walker 81850 cats - JeepForum.com
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post #1 of 19 Old 07-25-2021, 11:05 AM Thread Starter
Fourspeedman
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Walker 81850 cats

Is this the only CAT setup that will satisfy the OBD2 requirements on a 2001 XJ? Any other manufacturers?


Mark in Queens- Home of Spiderman and the Ramones
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post #2 of 19 Old 07-25-2021, 12:49 PM
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The 81850 is CARB compliant so it's 50 state legal. I don't know the emission laws in NY. You should check the emissions label to see if it's Federal or CA. I think all 2001 are CA.

Magnaflow and BRE make CARB compliant cats. They are more expensive.
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post #3 of 19 Old 07-25-2021, 08:22 PM Thread Starter
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NY is the same as CA. You are not supposed to even be able to buy non C.A.R.B. compliant parts here. Yes. '01 used the CA CATs. They are around $800 unless I can find a sale. We think the 0331 head crack may have let coolant contaminate the CATs. I am having my son in law graph all four O2 sensor readoutss on his laptop and see what is going on. Basically, if the downstream O2 sensor is reading close to what the upstream sensor is, it means the CAT is not working.

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post #4 of 19 Old 07-25-2021, 09:20 PM
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Basically in the state of NY, based on your year model, you are required to install a CARB converter if your emission label says California. If it says 50 states, you may use a Federal compliant converter which is much cheaper. If you can't find your emission label your build sheet will say.

https://www.walkerexhaust.com/suppor...ter-guide.html

04 WJ 4.0 - Avital 4103, DB-ALL
91 XJ 4.0 - Avital 4103, Stage-2 aFe intake system, BBK high flow Throttle Body, 703s injectors, Jones Exhaust A3518M-5

2020 RECOUNT
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post #5 of 19 Old 07-26-2021, 09:50 AM Thread Starter
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"NEW YORK (Effective 6/1/2013) 
CARB-compliant aftermarket replacement converters are required for California Emissions Certified vehicles model years 1993, 1994 or 1996 and newer operated in the state. EPA-compliant converters may be used on vehicles from model years 1995, 1992 and older, OR all Federal/EPA-only Emissions Certified vehicles regardless of model year. " This is it. Now I have to go find out what the label says. But my '00 is a CAL car and I am certain the '01 is too. The rule of thumb here is that if it is OBD2 then you are a CAL emissions vehicle.

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post #6 of 19 Old 07-26-2021, 02:18 PM Thread Starter
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So I went out with my scan tool and infra-red thermometer to see what the deal was. After I let the engine get hot I tested the sensors and CATs. The O2 sensors were working fine. Both of the upstream ones were fluctuating fast from .100 to .800 volts. The downstream ones were less wild and slower to change. Never did the downstream ones match the upstream ones. That is what the FSM said should be happening. I also shot the CATs with the temp gun. They were both between 400 and 460 degrees. Again, this indicates they are working. Hmmmmmm. No CAT code lately but there was an injector code for open circuit on #1. Probably not related as my daughter said it started to run rough out of the blue. The Aggravation Assurance Connector was missing. That probably let the connector get loose so I just tie-wrapped it down. If the injector was acting up without setting a code yet, that may have upset the CAT enough to set a code. Never a dull moment with these things.
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post #7 of 19 Old 07-26-2021, 04:15 PM
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is there a code?
Any issue with emissions test?

For inj (P0201) code first double check the inj connector.

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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post #8 of 19 Old 07-26-2021, 04:52 PM Thread Starter
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Jtec- yes, that was the code. And I set it again while fooling with it. The little red clip was missing so I tied the connector down with a twist-tie from a loaf of bread. Those little red push clips? Even new injectors don't include them. I went to my local Jeep stealership and the parts guy had no idea what I was talking about. We then figured out that you must buy a complete fuel injector wiring harness which will then include the clips. AS IF! You could make a fortune selling those things. Between my two XJs at least half are missing or broken.

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post #9 of 19 Old 07-26-2021, 08:38 PM
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Quote:
Originally Posted by Fourspeedman View Post
Jtec- yes, that was the code. And I set it again while fooling with it. The little red clip was missing so I tied the connector down with a twist-tie from a loaf of bread. Those little red push clips? Even new injectors don't include them. I went to my local Jeep stealership and the parts guy had no idea what I was talking about. We then figured out that you must buy a complete fuel injector wiring harness which will then include the clips. AS IF! You could make a fortune selling those things. Between my two XJs at least half are missing or broken.
I bought 6 new connectors with pig tails for like 10 bucks for my idiot XJ



After install:

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post #10 of 19 Old 07-27-2021, 02:27 AM
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Quote:
Originally Posted by Fourspeedman View Post
Jtec- yes, that was the code. And I set it again while fooling with it. The little red clip was missing so I tied the connector down with a twist-tie from a loaf of bread. Those little red push clips? Even new injectors don't include them. I went to my local Jeep stealership and the parts guy had no idea what I was talking about. We then figured out that you must buy a complete fuel injector wiring harness which will then include the clips. AS IF! You could make a fortune selling those things. Between my two XJs at least half are missing or broken.
Most if not all of mine are busted and best I can tell it doesn't effect a thing.
I think those "locking clips" that you see are more for manufacturing purposes.
So stuff doesn't pull off while the vehicle goes down the line.
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post #11 of 19 Old 07-27-2021, 08:52 AM
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mopar # 05013995AA

google, or visit NAPA.

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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post #12 of 19 Old 07-27-2021, 09:01 AM
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Quote:
Originally Posted by jtec View Post
mopar # 05013995AA

google, or visit NAPA.
I have looked at my store.
And even though some pigtails do up come I don't think they are correct.
But best I can tell there is no red clip with them even if they are anyway so....
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post #13 of 19 Old 07-27-2021, 09:04 AM
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You are at NAPA?
WHat happens if you search by OEM # ? 05013995AA

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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post #14 of 19 Old 07-27-2021, 09:15 AM
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Quote:
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You are at NAPA?
WHat happens if you search by OEM # ? 05013995AA
Yeah but I work in the back. I am not a counter guy.
Well I have looked, by the way get rid of the 0 in front, and it comes up with this.

https://www.napaonline.com/en/p/ECHE...cleAddPDP=true

But it doesn't really look like this to me:

https://www.ebay.com/itm/254296041006

Plus again not seeing the little red clip on the Napa one.
Of course me doing at the store with the system there instead of online might yield different results.

Oh and for the record.
I have been watching these guys for more then 10 years now and I know a thing or two. LOL.
While at my store I would be an "eh" counter guy at a place like Advanced Auto Parts or Autozone I would be a rock star. LOL.
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post #15 of 19 Old 07-27-2021, 09:52 AM
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I see the price went up but this is what I bought.

I was impressed by the wire quality, that aircraft like teflon insulation and tinned wire.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1





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Last edited by Wyo; 07-27-2021 at 10:06 AM.
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