Question about 2005 Lincoln Town Car

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2005 Lincoln Town Car suffering from low fuel pressure, I have Changed Fuel Rail pressure sensor, Fuel Pump driver, the fuel pump in the tank and the fuel filter but it is still showing only 26 psi fuel rail pressure?

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  • Anonymous Mar 18, 2014

    Error code P0453

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  • 71 Answers

The ford spec listed in the ford engine control manual is:

General Specifications Item Specification Fuel tank capacity 71.9L (19 gal) Fuel Pressure Hot restart 448-482 kPa (65-70 psi) Key ON Engine OFF (KOEO) 140-415 kPa (20-60 psi) Key ON Engine Running (KOER) 170-280 kPa (25-40 psi)

Are you measuring the fuel pressure with a mechanical gauge or are you using a scan tool . If with a mechanical gauge, does the gauge have an air purge? What symptoms does the vehicle present. If running rough you could have a fuel injector leaking. Are you measuring the fuel pressure with the key on engine off? If so, did you cycle the key a few times? Good luck

Posted on Apr 05, 2011

  • leewells799 Apr 05, 2011

    Hi,
    The pressure is being measured by a scan tool, with the vehicle running, The symptoms are: no fault with the vehicle running in regular road conditions but when vehicle is caught in heavy congestion and the vehcile is stop/start the vehicle then starts to misfire. As soon as the road is clear the vehicle runs fine. Sometimes a fault code P0190 which is FRP malfunction is shown but not everytime. Thanks

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Fuel control module 2008 escalade and the fuel pump quit working.if I run a hot wire to it it will run but as soon as I remove the hot wire it quits


Ran a hot wire to what fuel pump or the control module ? Which of these is yours ?
Figure 9: Fuel Controls - Fuel Pump Controls (LY6)
Figure 10: Fuel Pump Flow Control Module (Except LY6) Does yours have fuel pump flow control module under the vehicle Fuel Pump Flow Control Module (except LY6)
Mounted to the left side of the frame assembly below the driver seat ?
Fuel Pump Flow Control Module (FPCM) - LMF
The fuel pump flow control module (FPCM) is a serviceable GMLAN module. The FPCM receives the desired fuel pressure message from the engine control module (ECM) and controls the fuel pump located within the fuel tank to achieve the desired fuel pressure. The FPCM sends a 25 KHZ PWM signal to the fuel pump, and pump speed is changed by varying the duty cycle of this signal. Maximum current supplied to the fuel pump is 15 amps. A liquid fuel pressure sensor provides fuel pressure feedback to the FPCM.
Electronic Returnless Fuel System (ERFS) - LMF
The electronic returnless fuel system is a microprocessor controlled fuel delivery system which transports fuel from the tank to the fuel rails. It functions as an electronic replacement for a traditional, mechanical fuel pressure regulator. A pressure vent valve within the fuel tank provides an added measure of fuel pump flow control module (FPCM). Desired fuel pressure is commanded by the engine control module (ECM), and transmitted to the FPCM via a GMLAN serial data message. A liquid fuel pressure sensor provides the feedback the FPCM requires for Closed Loop fuel pressure control.
If your vehicle has this system check it for DTC'S - diagnostic trouble codes . Will take guess work out of it .
DTC P0191: Fuel Rail Pressure (FRP) Sensor Performance
DTC P0192: Fuel Rail Pressure (FRP) Sensor Circuit Low Voltage
DTC P0193: Fuel Rail Pressure (FRP) Sensor Circuit High Voltage
DTC P0230: Fuel Pump Relay Control Circuit
DTC P0231: Fuel Pump Control Circuit Low Voltage
DTC P0232: Fuel Pump Control Circuit High Voltage
DTC P023F: Fuel Pump Control Circuit
The engine control module (ECM) supplies voltage to the fuel pump flow control module (FPCM) when the ECM detects that the ignition is on. The voltage from the ECM to the FPCM remains active for 2 seconds, unless the engine is in crank or run. While this voltage is being received, the FPCM supplies a varying voltage to the fuel tank pump module in order to maintain the desired fuel rail pressure.
DTC P025A: Fuel Pump Control Module Enable Circuit .
Ford Electronic Returnless Fuel System Diagnosis Part 1 this for ford but the GM system works the same . You'll need a wiring diagram so you know what wires are what . Free wiring diagrams http://www.bbbind.com/free_tsb.html

Oct 31, 2016 | Cars & Trucks

2 Answers

Hard starting


It can be caused by a bad crankshaft sensor, plugged fuel filter, or clogged tank internal filter, as well as a failing fuel pump. Although the crankshaft sensor may not seem to be related to the fuel group, fuel demand is anticipated by counting the RPM's which is the crankshaft sensors job.
Now "hard to start" issues can be fuel pump pressure problems. But do not forget the "cold start routine" which requires a temperature sensor to set the engine management system for a cold start. It becomes less of a factor when the engine is warm but would not be responsible for low fuel pressure.
A simple test for vacuum leaks is to have the engine running and use a spray bottle of water on vacuum lines, intake gasket seams, EGR pod and the brake booster. A leak will reduce RPM or stall the engine.
For the internal tank filter, sometimes the plastic screen on the fuel pump deteriorates and clogs the pump intake. To test that, blow air into the fuel test port. This will help clear debris inside the tank temporarily, then check fuel pressure without driving the car and stirring the tank up. If pressure improves you know the root cause of your problems.

Jun 27, 2013 | 1997 Lincoln Mark VIII

1 Answer

1983 lincoln town car fuel pump comes on for 2 seconds thats it then has no power.


It needs several signals to continue running. You do have a fuel pump Relay which can kick out.

Check the fuel pressure test port to see if pressure is maintained. The crankshaft position sensor sends info to regulate fuel pressure.

Mar 18, 2013 | 1983 Lincoln Town Car

1 Answer

I have a 1998 Lincoln Town Car Catier. It seems like it won't start when it is cold, but after I let gas out of the valve on the fuel rail, it starts right up. What could be the problem?


This problem is caused by a defective fuel pressure check valve in the outlet of the in tank electric fuel pump. The part is a ball and spring check valve and it is leaking. This allows pressure to bleed off and this causes an air pocket, the air pocket causes the hard starting. The pump is located inside the the fuel tank and is sold as one part, sending unit for gage and pump, it is called the fuel pump module.

Jan 23, 2012 | 2005 Pontiac Sunfire

1 Answer

I have a lincoln town car 1999 and the car is running but shaking and the psi on the fuel pump is 24. What should it be?


If all you got at the fuel rail is 24#,it should
be around #40

You may or not be, able to disconnect any vacuum
hoses on the pressure regulator & see if you get
actual pump pressure,more than #40

If will assume you already know the age & miles
on the gas filter

Sounds as though the fuel pump is gone,if it is
from 1999, just drop the fuel tank & replace it,
before you break down somewhere

Jun 10, 2011 | 1999 Lincoln Town Car

1 Answer

Where is the fuel pump in a 86 lincoln town car located


inside the gas tank, and also onthe driver side frame rail under the car under the driver door hindge inside the frame rail with a plastic cover over it held on with a hose clamp and held to the frame with a self threading bolt that has a 13MM head. has a fuel line ( plastic ) comingout ofboth ends and a 2 wire electrical connector. The tank pump is in the front side of the tank and with the car jacked up by the body it's just above the rear axel and can be removed with the tank still mounted to the car.. The tank needs to be level and less than 1/2 full orr the fuel will come out as the tank is opened. some cars have only the tank pump, and none on the frame.

Jun 12, 2010 | 1986 Lincoln Town Car

1 Answer

No pressure at fuel rail.fuel pump works


Check the fuel filter under the car near the fuel tank. It must be plugged solid

Apr 11, 2010 | 1993 Lincoln Town Car

1 Answer

1998 Lincoln Town Car cranks but does not start. Fuel pump, cam sensor, crank sensor, fuel pump relay, fuses and breakers are OK. No fuel to the injectors. What about ignition or computer


possible just not probable. you need to see if there is any pressure to fuel rail. if not youre going to have to by pass the fuel pump and see if it is getting voltage. if so then apply a seperate voltage and ground wire to the pump to see if it kicks on. come to think of it, it could be the PATS system(security) that shuts down the system. it will crank but will not fire. your ford dealer will need to reprogram the system.

Nov 03, 2009 | 1998 Lincoln Town Car

4 Answers

1999 lincoln fuel pump


My fuel pump on my 1998 Lincoln Continental has no power. I checked the fuse it is good. I checked the fuel shutoff switch it was fine. I have traced the wire from the fuel shutoff switch to the fuel module driver in the trunk. The wire has power. I have also traced the positve wire from the fuel pump to the fuel driver on a different terminal, this wire has no power from the pump. I also changed the fuel driver, the low fuel pressure switch, the alternator, and battery.does anyone have any suggestion's?

Oct 27, 2008 | 1999 Lincoln Town Car

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