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-   -   Replacing my catalytic converter (http://www.focusfanatics.com/forum/showthread.php?t=308245)

Zeroe31890 02-02-2013 06:57 PM

Replacing my catalytic converter
 
I need help figuring out how to properly buy a catalytic converter for my 2000 ZX3. My engine light is on and I am getting code P0422, and unfortunately the cat is the most likely culprit. I also have error P0455, but I don't think that is causing the cat to give that error, but I mention it just incase it may.

Anyways, I have done some research and found out it'll cost between $500 to $1400 to get that fixed (odds are the larger range). I have searched for cats online, and have seen stuff ranging from $100 to $300. I would rather do it myself to save money. Problem is I need to make sure it will make the engine light turn off and make sure the cat works well enough to get me to my internship as well as pass inspection. Hopefully someone can help me figure it out. I believe my cars engine is a 2.0L I4 SOHC 8V FI Engine. I really appreciate any advice and help in the matter!

BC_ZX3 02-02-2013 09:31 PM

For starters, the ZX3 was only ever fitted with the 2.0 liter DOHC (Double Overhead Cam) engine. The SOHC engine type you've quoted is not the correct one.
New catalysts are expensive due to the materials that go into making them. Finding a used one at the junkyard may be a better bet if cost is an issue as 1) you're ensured a correct fit and 2) cost will be considerably less than a new one.
Catalysts can be diffcult to remove if you have only a basic tool set. You need to remove the upstream 02 sensor (requires a special socket) and undo a large EGR tube nut. Rusty fasteners through out can also be problematic.

sleepyboy 02-02-2013 09:53 PM

Much cheaper to buy an aftermarket cat or one from a junk yard. You can get one from HERE at CFM or even cross shop the part numbers to find it else where.

Zeroe31890 02-02-2013 10:35 PM

Reply
 
Oh i'm sorry. You are probably right. Thanks for correcting me.

Quote:

Originally Posted by BC_ZX3 (Post 4570139)
For starters, the ZX3 was only ever fitted with the 2.0 liter DOHC (Double Overhead Cam) engine. The SOHC engine type you've quoted is not the correct one.
New catalysts are expensive due to the materials that go into making them. Finding a used one at the junkyard may be a better bet if cost is an issue as 1) you're ensured a correct fit and 2) cost will be considerably less than a new one.
Catalysts can be diffcult to remove if you have only a basic tool set. You need to remove the upstream 02 sensor (requires a special socket) and undo a large EGR tube nut. Rusty fasteners through out can also be problematic.


tmittelstaedt 02-03-2013 03:38 PM

Before swapping the cat out, replace BOTH the upstream and downstream O2 sensors with new sensors and see if the check engine light goes away. it will cost about $100 for 2 bosch sensors from the parts place but you may just have a bad sensor. This is a DIY project you just need a O2 socket, a socket wrench, and a jack and jackstands.

And, if this does not fix it then if you buy a brand new cat to replace it, you will find the small print requires that you replace all O2 sensors when you replace the cat or the manufacturer will not warranty it, so it's not money down the rathole.

Where I live every cat that comes into a wrecker goes straight to the metal recycler, you can't find used ones that way.

jetrinka 02-03-2013 03:44 PM

The O2s are most likely fine as it only sets this cat code when it sees the activity from the rear sensor mirroring the front sensor, thereby it assumes the cat isn't doing anything.

tmittelstaedt 02-03-2013 04:01 PM

jetrinka, I bought a used 2001 Focus SE back in December that was giving me that code and replacing both O2 sensors fixed the problem. I bought it knowing that code was set and assuming I would have to replace the cat, so it was a nice Christmans present from the auto gods i guess.

I know what the theory says but this is one area where practice differ in how Ford implemented it. In fact when I went to buy the sensor I had the OReilly parts manager confirm the code read with their scan tool (since I use a cheap $9.99 Chinese USB-to-laptop OBD scanner) and the parts guy said that usually only changing the front sensor was needed to fix that problem. I did both because I figured if one was bad the other was at the old rage stage also.

Zeroe31890 02-06-2013 05:47 PM

Thanks for the link! I do have one concern though. I read in a few different places that using an after market cat could potentially not make the check engine light go off? Another issue would be fitting it in my specific model. At least the second part was explained to me at a ford dealership. Your thoughts or advice?

tmittelstaedt 02-06-2013 10:10 PM

http://www.lkqcorp.com/search-inventory.aspx

Link from an online parts catalog at a local auto wrecker - they have 4 used Ford ones in inventory. Probable cost is under $100. They warranty and ship around the country.

350668553163 Ebay part number for aftermarket converter, complete setup, pipe, etc. Bolt in. 60 day warranty. $180. 99.2% positive feedback.

JC Whitney - Eastern Direct Fit converter - $270. warrantied.

The remove and replace of the converter is extremely easy - tools needed - breaker bar, socket set, socket extensions, jack and jackstands, Never Seize O2 sensor socket

Parts needed:

converter
gaskets (from ford)


open hood, remove 4 bolts and remove exhaust heatshield. Remove O2 sensor. remove 3 nuts on studs.

Raise car, remove bottom o2 sensor, remove converter retainer, remove converter to exhaust line bolts and remove brackets, lower converter and remove, install new converter, retighten all bolts install O2, lower car, install top O2, install nuts install heat shield.

This is like an hour project if you have all the parts ready and the tools ready.

With an aftermarket converter let's say $300 from a local shop, 2 O2 sensors, $100, gaskets & misc shop supplies, $50, labor $50. $500 is about right. If a shop does it they will warranty that it does not work.

With you doing it from a Ford wrecking yard converter - maybe $100-$150 With you using some guy from Craigslist who moonlights auto repairs and a wrecking yard converter - $200-$250.

Since your convinced it's the converter and aren't willing to try changing out the O2 sensors like I said to do, you might as well use a wrecking yard converter from a local wrecker since your going to be putting it in and taking it out to return for another one about 2-3 times before you look at the O2 sensors. That will be a Ford converter so you won't have to worry that it won't fix the CEL.

All these cars use the same converter so they are plentiful in the wrecking yards. The yards only inventory catcons from wrecks where the engine will start and the CEL is not set.

Zeroe31890 02-07-2013 07:31 AM

Its not that I didn't listen to you haha. I went to a ford dealership and they told me I have to change it. But there was also an evap leak. I didn't have the money for a $1200 converter, so I told them to just fix the evap. They have, and so far, the engine light has been off. I am crossing my fingers that was actually causing the o2 sensors to go crazy. Come inspection time, which is in a month, I must change it if I fail due to the cat actually needing to be replaced. Hence why I ask. But I havent made any commitments to replace it until inspection if it even needs to be changed. Just asking the question because of issues with aftermarket parts and some cars. Since we got experienced ford focus people here, I figure the question is good here.


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