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2004 - 2008 Ford F150 General discussion on the 2004 - 2008 Ford F150 truck.

misfire backfire problem solved

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Old 05-15-2012, 08:54 PM
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Default misfire backfire problem solved

went threw all the first causes of this problem coils/plugs/MAF ext next thing on my mind was cats internal fuel filter malfunctioning o2's kept checking stuff and then checked the pcv and vacuum system.... ran seafoam through the vacuum system problem solved will be replacing the vacuum lines soon cant believe it was that simple but that seems to be how it always works out! so advice to people possibly having the same problem check your vacuum system or just run seafoam through it!
Old 05-15-2012, 09:18 PM
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How exactly did you run it through the vacuum system?
Old 09-15-2012, 01:02 AM
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Originally Posted by Apachecowboy78
How exactly did you run it through the vacuum system?
Use the vacuum from your brake booster and use a solo cup to hold the seafoam



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