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Old 12-03-2013, 07:51 PM
82Stang 82Stang is offline
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Re: 2003 Focus, hesitates

Key on engine off 35 to 45 psi
engine running 28 to 45 psi

There was a recall I believe about faulty fuel pumps, which you might want to check on if you havent already. Also there is a fuel sensor on the rail/engine and a fuel module under the back seat, which might be of significance. Good luck.
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