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2003 Mercury Marauder 4.6L Hesitation, MIL Lamp on
Posted to Ford Driveability on 5/29/2013 7 Replies

When driving fuel pressure will deep as low as 15 psi under accel on the mechanical fuel gage hooked in line. Main question is while does fuel pressure change so drastically when hot even at idle? whats good fuel pressure for this car?

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car Vehicle Data

2003 Mercury Marauder

VIN 2MEHM75V33
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / FUEL PRESSURE IS 27 PSI COLD
EmissionsOBD-II Compliant
SymptomsHesitation, MIL Lamp On
OccursUnder Load, on Decel
Misc.90/02

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
P0190Fuel Pressure Sensor Circuit Signal Voltage Too High
Message Closed

car Vehicle Data

2003 Mercury Marauder

VIN 2MEHM75V33
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / FUEL PRESSURE IS 27 PSI COLD
EmissionsOBD-II Compliant
SymptomsHesitation, MIL Lamp On
OccursUnder Load, on Decel
Misc.90/02

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
P0190Fuel Pressure Sensor Circuit Signal Voltage Too High