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I checked fuel pressure and it is 56psi at idle and it drop to 54psi above

(2002 Land Rover Freelander)
in Apex, NC on September 16, 2012
it set code p0171 and p0174
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Popular Answer
on September 18, 2012
There are several things that can cause those codes - you need a technician with diagnostic equipment and experience to diagnose it.
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