The end all p0420 code thread... - Page 3 - JeepForum.com
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post #31 of 50 Old 04-09-2013, 02:56 PM
Galaxie500LTD
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Quote:
Originally Posted by funkduck View Post
I could imagine a short trip, low RPM lifestyle could lead to crusty cats once in a while.
If it looks like this... definitely replace it.

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post #32 of 50 Old 04-09-2013, 03:18 PM
shocking1
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Hahaha. I think I'm beyond a 30 minute trip to clean it out I drive 45 mins at 75 to school twice a week. In gonna go ahead and change it
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post #33 of 50 Old 04-09-2013, 03:50 PM Thread Starter
platinum5.9
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I'd say email Nick kolak@AOL.com and ask him if the magnaflow precats are 50 state.

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post #34 of 50 Old 04-09-2013, 03:55 PM
shocking1
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Already ordered from him thanks!
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post #35 of 50 Old 04-09-2013, 09:30 PM
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I had a similar problem with the P0420 code lit up. I checked with a muffler guy who said the cats and exhaust looked ok. I bit the bullet and replaced the 4 O2 sensors. When I removed the first sensor, which is before the first cat, I found the electrical wiring plug was broken. I replaced all the sensors since I had no idea if they had ever been serviced and the Jeep has 169,000 miles. The light stayed on till I unplugged the battery for 45 minutes (30 is recommended, but I was getting a drink and didn't want it getting warm). All the codes cleared up and they have stayed off. So far I've driven almost 200 miles without the lit light so I think I solved the problem.

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post #36 of 50 Old 06-02-2013, 09:54 PM
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I was wrong, the code came back. In addition when I start up I get a large puff of very white smoke. Recently I went on a trail ride of about 50 miles. One of the other riders told me I was blowing white smoke when I put the transmission in 4low to get up a hill. I think this really means the pre-cats are gone so I'm considering what to replace them with. I did find one Magnaflow system on-line which has the Y pipe, both pre-cats and the 4 sensor holes all assembled for a cost under $300. Does this sound like the right thing to do?

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post #37 of 50 Old 06-02-2013, 10:49 PM
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Quote:
Originally Posted by Harriedtwo View Post
I was wrong, the code came back. In addition when I start up I get a large puff of very white smoke. Recently I went on a trail ride of about 50 miles. One of the other riders told me I was blowing white smoke when I put the transmission in 4low to get up a hill. I think this really means the pre-cats are gone so I'm considering what to replace them with. I did find one Magnaflow system on-line which has the Y pipe, both pre-cats and the 4 sensor holes all assembled for a cost under $300. Does this sound like the right thing to do?
got a link?
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post #38 of 50 Old 06-03-2013, 05:28 AM
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White smoke is usually moisture or antifreeze. Black smoke = gas, blue smoke = oil.
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post #39 of 50 Old 06-25-2013, 10:59 AM
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Lots of good info in here, even with the bickering.

Has anyone ever tried cleaning O2 sensors with something? Maybe brake parts cleaner?

Or spraying something down the O2 bung into the mini cats?

Andy, KD8EIA
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post #40 of 50 Old 06-25-2013, 11:12 AM
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Just to give you guys an update. My p0420 code went away after replacing the precats with high flow magnaflow cats that I got through kolak. Even on my 50 state wj, I was concerned that due to the smaller size they would still throw codes.
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post #41 of 50 Old 06-25-2013, 04:35 PM Thread Starter
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Still no codes after replacing my mini cats. Did the trick.....

03 Grand/WJ-White 4.7HO/QD/242HD Clayton 6" LA,5100,Clayton skid,Custom Rockers,JK OME SS,17"Rock Monsters 33"Interco Irok ND,Muffler delete/MF cats,SOLID D30/BTF D44a,Fawkes,Projectors/HID
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post #42 of 50 Old 07-08-2013, 12:33 PM
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I did the lacquer thinner thing on my wife's 2005 Suburban. The light went out for around 1000 miles. There does not seem to be any performance drop at this time.
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post #43 of 50 Old 07-09-2013, 06:55 PM
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Yea I had the same code a while back. Ended up replacing my drivers side mini cat. I was told it could have been the sensors. It wasn't, also was told the magnaflow cat was too small and would cause flow issues along with being told I needed a much more costly cat. Would love to do the other side but well, I am broke and the order was screwed so I got them separately. I was gonna have to drive it so I just had the one done. The other is on a shelf now. Also noticed the rear main cat is gone. Evidently the PO did that. He also screwed the radio mount with his damn double din setup.
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post #44 of 50 Old 07-09-2013, 10:02 PM
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Quote:
Originally Posted by kens97sto171 View Post

I have also heard that this will clean out a cat. Saw a reputable repair guy who does YouTube simple fix videos talk about this. Simple to try with no risk really.
Scotty Kilmer!

/ 2002 WJ 4.7 H.O. / Flowmaster 50 SUV / Magnaflow Cats / Rocking that 2WD! /
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post #45 of 50 Old 07-18-2013, 12:49 PM
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You can easily space out an O2 by buying a bung, drill it out to accommodate the sensor, then place it into the existing bung witch will lift the sensor out of the exhaust stream. As long as its a good sensor the computer will think the cat is doing its job.
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