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  #11  
Old 07-19-2011, 12:06 PM
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devsoul devsoul is offline
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P0420 Catalyst Effect
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  #12  
Old 07-19-2011, 12:33 PM
atvfamly atvfamly is offline
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Hmmm...........
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  #13  
Old 07-19-2011, 09:27 PM
dodgeman9859L dodgeman9859L is offline
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well guys i hate to interupt on you guys thinkin its only 99 sports but my 98 2500 has been doing that since winter. iv changed every sensor on my engine and complete tune up plus the 02 sensor before the cat. still does it. only personwhos givin me a decent idea of what it is was my brother in law who said it was a bad intake manifold gasket. not the plenum gasket that makes you burn oil. theres another gasket supposedly that does it. so thats what iv been told but im too broke to bring her to the shop for their opinion on it. so id say look there and let us all know how it turns out.
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  #14  
Old 07-19-2011, 10:18 PM
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devsoul devsoul is offline
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I am taking it to a garage after work tomorrow to have my cut out welded back in the converter. I will stop and get a small methane torch, if it is a blown gasket causing a vacuum leak I should be able to find the leak with the torch(unlit of course).
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  #15  
Old 07-20-2011, 12:47 PM
dodgeman9859L dodgeman9859L is offline
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well hopefully you can get it figured out and give me some more insight on how to fix mine too. good luck.
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  #16  
Old 07-20-2011, 10:28 PM
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Default Problem solved, almost!

Here we go.
I took the truck and had my cut out welded back in the converter. I had an idea on my way home that since my converter was empty I didn't need the new O2 sensor I just put in. I thought I could use the plug off of the old sensor, plug it in where the front sensor goes, bare the ends, push them in the sensor plug and use the back sensor instead. Well, the plugs are different sizes. So I decided to leave the front one unplugged and see if I still had the problem. It is running good now. The computer must go into a default setting when it senses the O2 is unplugged. I sugest unplugging your O2, one at a time to see if it helps. The front one plugs together right above the transmission, the rear on the side. I am going to leave it unplugged and see how it runs for a couple of days.

If anyone knows how to post video, I will get it running bad before I replace the sensor and post it so you can tell better if this is the same problem you are having.

I also took my cap off and cleaned the rotor last night. That seemed to help it run smoother. Going to change those soon also.

Let me know if this was any help.

Last edited by devsoul; 07-20-2011 at 10:34 PM. Reason: spelling errors again
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  #17  
Old 07-20-2011, 11:34 PM
dodgeman9859L dodgeman9859L is offline
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well my front 02 sensor i replaced this past spring so that should be fine. possible the back one needs replacing. just cant wait to get the crap out of my cat so my exhaust flows good. hopefully everything will make it run good.
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  #18  
Old 07-21-2011, 09:53 AM
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It ran fine all the way to work this morning
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  #19  
Old 07-21-2011, 03:06 PM
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This answers the problem I was having-
HTML Code:
http://www.justanswer.com/dodge/4qgod-dodge-ram-1500-4x4-02-1500-5-9-gas-150000-mi-runs-rough-within.html
Thanks to deanthecrabman!
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