1997-2006 Expedition & Navigator 1997 - 2002 and 2003 - 2006 Ford Expedition and Lincoln Navigator Discussion

P0172, P0174 plus misfire code. really need help!!!!!!

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  #31  
Old 02-07-2013, 07:55 PM
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alloro
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I watched both videos and see why you're confused, but frankly the two videos are different. To me your reading indicates a vacuum lean combined with a misfire, not a restricted exhaust. But I'm just seeing the video, perhaps something is getting lost by not being there in person.
 
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Old 02-07-2013, 09:24 PM
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Originally Posted by alloro
I watched both videos and see why you're confused, but frankly the two videos are different. To me your reading indicates a vacuum lean combined with a misfire, not a restricted exhaust. But I'm just seeing the video, perhaps something is getting lost by not being there in person.
At first i was confused but after all the test that I've done I'm sure its a bad cat along with a very big vacuum leak. the reason I'm sure is because there was a huge improvement only after i removed the bank 1 o2 sensor and when i put it back in the symptoms returned.

There might still be misfires and bad coils but i don't want to do anything until i can fix the vacuum leaks I'm just having a problem finding it.
 
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