Ford Focus Forum, Ford Focus ST Forum - View Single Post - 2003 ZTS - horrible gas mileage - 16.3mpg - HELP
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Old 09-28-2012, 12:17 PM   #13
PWGuy
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Join Date: Nov 2011
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Location: Belvidere, IL
What I Drive: 2003 Pitch Black ZTS Sedan

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Quote:
Originally Posted by Wagone View Post
Pull an O2 sensor and look at back pressure
Sorry, I'm not following the second half of what you suggested - "look at back pressure". What does that mean and how do I do that?
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