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  #1  
Old 12-05-2012, 02:09 PM
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Default 2008 4.7 idle @500rpm and random misfire code

About a week ago my check engine light came on. Went home and hooked up the code reader and the code was p0300, random misfire. So I replaced all of the lower bank plugs with news ones from the dealership. Code went away but now it's idling @ 500 instead of the normal 600 and its fluctuates between 500-600 while sitting at red lights etc. the exhaust doesn't have a smooth tone like it should. So I just cleaned the throttle body but still has low idle.
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Old 12-05-2012, 08:26 PM
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Old 12-08-2012, 10:43 AM
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Ok did that. Worked for about a day and now it's back to about 500.
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