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Old 12-27-2016, 12:56 AM   #51 (permalink)
phunk
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Join Date: Mar 2009
Location: Chicago
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If the A/F is clean at the moment it is happening, than it is unlikely related to the fuel pressure. The o2 sensor feedback system will typically adjust for a fuel pressure spike at idle with ease so long as it is not outside its range of allowed correction. If your car has a custom tune that was generated on your car while the fuel pressure had the same profile, its even less likely related.
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