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Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > WK Grand Cherokee & XK Commander Forum > Looking to replace Catalytic converter.

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Unread 08-18-2014, 01:39 PM   #1
JeepGC05
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2005 WK 
 
Join Date: Jul 2014
Location: Flushing, NY
Posts: 24
Looking to replace Catalytic converter.

Still getting the check engine light after 500 miles (including driving to and from PA) keep getting the same code PO420. Leads me and based on internet research that the Cat is no good. So I seen a few on line relatively cheap, but I need to know what size and O2 placement. Can someone please help me out.

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Unread 08-18-2014, 02:30 PM   #2
Kolak
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Are you just looking for a single converter to replace the bad one? I can supply you with a good Magnaflow replacement. PM me and we'll chat.
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Unread 08-19-2014, 07:44 AM   #3
WKeer
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Did you try the spark plug non fouler trick?

I would try that first if it's just the CEL you are looking to get rid of. Won't be kosher in a state with strict or should I say any emission standards but it's a <$10 fix with the non fouler and some stainless steel wool. Just google it as there are many good write-ups on how to do it.
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Unread 08-19-2014, 08:01 AM   #4
RCS1300
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How did you determine that the Catalytic Converter needed replacement?

Had you already visually inspected the current Catalytic Converter or checked for an exhaust leak or had the O2 sensors checked for proper functionality?
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Unread 08-19-2014, 09:15 AM   #5
JeepGC05
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Quote:
Originally Posted by RCS1300 View Post
How did you determine that the Catalytic Converter needed replacement?

Had you already visually inspected the current Catalytic Converter or checked for an exhaust leak or had the O2 sensors checked for proper functionality?
I had a scanner hooked up and it had determined it was acting up. PO420 code
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Unread 08-20-2014, 08:59 AM   #6
JeepGC05
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Anybody know the exhaust pipe diameter?
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Unread 08-20-2014, 09:44 AM   #7
tabascocat
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Location: webster, tx
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I found out that both of my cats were bad soon after I bought my Jeep. Had already spent a good amount fixing other things, so I went the cheap route.

There is a city called Pasadena about 15 miles from me and it is an auto haven, about 40 - 60% cheaper to fix autos. I wasn't about to pay another 1k to replace those, so I went to Pasadena and shopped around. Came across a hole-in-the-wall muffler shop and looked over their reviews online. Many raved about them and their work, which has a warranty.

I told the owner that I just wanted two new cats at the least amount possible, he gave me three options including OE. I went with middle of the road and got two new, simple ones for a total of $360 installed, never had a problem since.

I don't know the measurements but any shop will know them.
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Unread 08-22-2014, 08:39 PM   #8
photoman63
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I am in the same boat. are you in TX? If so could you give me the name of that shop. My bank 2 clogged and stranded my this week.
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Unread 08-22-2014, 09:54 PM   #9
tabascocat
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Quote:
Originally Posted by photoman63 View Post
I am in the same boat. are you in TX? If so could you give me the name of that shop. My bank 2 clogged and stranded my this week.
Al's Muffler on Harris st in Pasadena. Al will even put a new, cheap muffler on for $60
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Unread 08-23-2014, 02:25 PM   #10
TNez
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I had a P0430 (same issue as P0420, just drivers side vs pass side) for two months beginning in June. I replaced all 4 oxygen sensors which didn't fix the problem. I then bought the Magnaflow converters part 49686 and replaced that two weeks ago which fixed it. Now I'm getting about 90 miles more per tank of gas also. Liquid wrench was my friend and it was a pain to do but worth it.


FYI I have an 05 4.7
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