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Question Asked: is 4 or 5 psi less fuel pressure enough to cause a po171 code
September 15, 2013, 04:51 PM
checked fuel pressure,only at 44 psi so I changed fuel pressure regulator. now it's at 50 psi. my car calls for 53-59 psi. only regulator I could find is rated for 50 psi. is this difference enough to cause a po171 code
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