code p0191. car chokes at 50 miles/hr. lack of power. replaced fuel rail pressure regulator and fuel filter.

2004 FORD E-SERIES VAN
140,000 MILES
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THOMASDUAN
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no other codes.replaced fuel rail regulator and fuel filter, still have the same problem. car choke at 45 mile, fell lack of fuel pressure.
Mar 10, 2012 at 8:23 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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