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P0191 Diagnostic Trouble Code Discussion for August 2010

Fuel Rail Pressure Sensor Performance

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Trouble Ticket Help Requests for DTC P0191
Help Request Posted
2006 Ford Mustang 4.0L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1ZVHT80NX6
P0191: Fuel rail pressure range performance. Hello everyone, Could use some help with this one. Car came in running extemely rough. Black smoke from tailpipe.Fuel pressure seems within spec 75 psi. Replace spark plugs, they were black, obviously running rich. I swapped out fuel pump driver module and fue...
August 05, 2010