Catalytic Converter 89 Wrangler - JeepForum.com
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post #1 of 18 Old 03-12-2019, 09:44 AM Thread Starter
Alexboy22e
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Catalytic Converter 89 Wrangler

Hello family, so I have an 89 Wrangler YJ 6 Cyl. 4.0 that failed smog. The smog tech said I needed to replace my catalytic converter. I called a few shops and they quoted me $230. One shop said my Jeep has 3 catalytic converters and I need to know which one is bad? I only see one when looking under my Jeep. Help guys? Does my Jeep have 3?

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post #2 of 18 Old 03-12-2019, 10:10 AM
jp360cj
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Are you sure you have a 4.0? They didn't come in Wranglers until 91 and are fuel injected. An '89 YJ with 6 cyl would be a 258 with a computer controlled carb. What state/county are you in and what tests do you have to pass for emissions?

We have no way of knowing what your Jeep has without looking, but according to the 89 factory manual, it sounds like it only came with 1 cat http://oljeep.com/89FSM/89Jeep_FullServiceManual.pdf - page 461

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post #3 of 18 Old 03-12-2019, 10:15 AM
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Should be a 258 6 cyl. Should only have one cat. Should be under the passenger by the tcase. Your motor may have been swapped in from something else and have a different set up though.

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post #4 of 18 Old 03-14-2019, 12:48 AM Thread Starter
Alexboy22e
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Thanks for the help. I live in California. So after some research, my Jeep has one Cat. I'm getting quoted for $230 for parts and labor
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post #5 of 18 Old 03-14-2019, 05:47 AM
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That's a fair price. just don't take it to the guy who thinks you have 3
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post #6 of 18 Old 03-14-2019, 08:27 AM
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just don't take it to the guy who thinks you have 3

Amen to that.
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If you cannot fix it with a hammer then it has to be an electrical problem.
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post #7 of 18 Old 03-14-2019, 08:28 AM
jtec
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the statement 'needs a cat' has me wondering HOW did he come to that diagnosis?

Did they give you a print out of - codes? exhaust readings? reason details for fail?
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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 18 Old 03-14-2019, 10:00 AM
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the statement 'needs a cat' has me wondering HOW did he come to that diagnosis?

Did they give you a print out of - codes? exhaust readings? reason details for fail?
Exactly. I’d want to give the paperwork to whoever’s fixing and make sure stuff gets addressed

[size=“3”]Shackles & D-rings are different things.
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post #9 of 18 Old 03-16-2019, 09:39 AM
timatoe
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$230 for parts and labor in CA isn't a bad price.

I guess they've gotten pretty sticky with CAT's supposedly having to be OEM when it comes to smog. I personally haven't had that issue, I've actually never had them even look at the CAT as long as it sniffed clean. But,,,,, if you're paying someone to do the work, I'd also use them for the smog when it's due.

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post #10 of 18 Old 03-16-2019, 10:58 AM
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$230 for parts and labor in CA isn't a bad price.

I guess they've gotten pretty sticky with CAT's supposedly having to be OEM when it comes to smog. I personally haven't had that issue, I've actually never had them even look at the CAT as long as it sniffed clean. But,,,,, if you're paying someone to do the work, I'd also use them for the smog when it's due.
got my van smogged last week and I'm pretty sure it has the original cat from 1990. The guy was under there looking all over it for numbers and finally gave up when I pointed out it had not been changed.
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post #11 of 18 Old 03-16-2019, 11:20 AM
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I paid a $179 for mine and installed it myself, so that's a good price. However, I hope this solves your problem. My 89 YJ 4.2 CarterBBD W/ stepper motor won't pass in California and I'm banging my head against the wall. I've replaced the Cat, pulse air valves, check valves, ECU, EGR valve, plugs, rebuilt the carb. Oxy sensor reads .2 volts when cold (lean). When CTO starts to open oxy reads .5/.6 volts (perfect). Engine hot.9 volts (rich). The stepper motor needles pull back when rpm is increased. Any one know what to try next? Bad CTO , TVS or 10" 4" hg vacuum switches? I'm stumped !!! Timing is at 9* set properly by book. Any help is greatly appreciated!

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post #12 of 18 Old 03-20-2019, 12:53 AM Thread Starter
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Here is the printout. Now I'm wondering why he said i for sure need a new CAT if this printout shows a "Pass" for the catalytic converter. I know my pulse air valve failed and i am missing one of my air control valves. You can see the rubber completely melted and it's like $200 for a new one.
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post #13 of 18 Old 03-20-2019, 12:56 AM Thread Starter
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post #14 of 18 Old 03-20-2019, 01:56 AM
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Catalytic Converter 89 Wrangler

If you end up replacing the Cat, magnaflow has some options for a similar or cheaper price to many OEM I had looked at for my 2000 Xj with the 4.0. Carb compliant with an engraved number specific to your model year based on the California board’s paperwork.

Mine passed CA smog with that just fine, granted 2000 is the cutoff year where they run only obdII and no sniffer, it should all be the same emission wise.


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post #15 of 18 Old 03-21-2019, 06:06 PM
Mechman71
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Be careful with the pulse air tube going into the cat, too. Those tubes are pretty fragile. They're available though Rockauto (last time I needed one that is), but the itty bitty pipe clamps that hold it on are made of unobtainium.

'89 YJ "Night Eagle" 4.2 5spd, Spinnaker blue/grey, hard top and doors, mostly stock and RUST FREE!!
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