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Bad Muffler “SOUND” 2010 3.5l


Rgant_1981

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I have a 2010 Journey 3.5 R/T with 155777 miles on the dash. After replacing the upper manifold with a used one from the junk yard (which is going on 3 wks now). It’s not sounding the same it did when I had the original manifold installed with the engine codes p0660 & p01005. I sounds like it needs a new muffler because you can hear me passing by. Remember, no codes on dashboard. Now the code p0401 did pop up but went away. I know the erg valve can make it run rough but with no codes, it seems odd. You would think it will throw an exhaust code or something… It feels like it’s pulling hard when I give it gas while driving. Anyone can tell me what it could be…? 

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