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Old 01-11-2013, 12:31 PM
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jlg2002 jlg2002 is offline
Tech Enthusiast
2005 Frontier King Cab
2005 Frontier LE King Cab
 
Join Date: Feb 2010
Location: So. California
Posts: 361
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Apparently you want it to be a cat problem huh.

You need to get a AF and o2 sensor reading of "live data" with the condition present and compare the two sides. This will tell you if the catalyst is working or not. FYI- My original response back to you was for you the recheck the plugs you just put in to make sure they were in fact not misfiring
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