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2002 Dadge Ram 2500 5.9 starts fine then rough idle

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Old Mar 7, 2018 | 02:24 PM
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Default 2002 Dadge Ram 2500 5.9 starts fine then rough idle

starts fine, then in about three minutes rough idle back fire if you floor it best bet is neutral rev engine for about a minute and it goes away. fine as long as you don't shut down. if you shut down it does it all over again..
 
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Old Mar 7, 2018 | 02:39 PM
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Mileage? Maintenance history?
 
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Old Mar 7, 2018 | 04:23 PM
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Failing O2 sensor.
 
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