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04 idle and bad miss

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Old 01-29-2014 | 03:15 PM
opie01's Avatar
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Default 04 idle and bad miss
I have an 04 expedition 4.6 and it had a slight miss I changed the spark plugs about a week ago and it instantly got worse it is idle weird goes from 600 to 1000 rpm and when driving has a real bad miss but is not showing any codes plz help ps... I have checked pcv valve for leak
 
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