Question about 1997 Mitsubishi Eclipse

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How do you troubleshoot the fuel pump system - 1997 Mitsubishi Eclipse

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Have fuel pressure measured.for one.

Posted on Apr 29, 2010

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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

1 Answer

Changed my fuel pump on my 06 ford 500 now I can only start if I hold the fuel reset and it doesn't stay running for very long why does that happen how can I fix this


By fuel reset do you mean inertia fuel cut off switch ? Why did you change the fuel pump ? Are you aware of the fuel pump driver module ! Your vehicle has a electronic returnless fuel system . It is computer controlled , has a fuel rail pressure an temp. sensor .
The FRPT sensor measures the pressure and temperature of the fuel in the fuel rail and sends these signals to the PCM. The sensor uses the intake manifold vacuum as a reference to determine the pressure difference between the fuel rail and the intake manifold. The relationship between fuel pressure and fuel temperature is used to determine the possible presence of fuel vapor in the fuel rail. Both pressure and temperature signals are used to control the speed of the fuel pump. The speed of the fuel pump sustains fuel rail pressure which preserves fuel in its liquid state. The dynamic range of the fuel injectors increase because of the higher rail pressure, which allows the injector pulse width to decrease.
Inertia Fuel Shutoff (IFS) Switch The IFS switch is used in conjunction with the electric fuel pump. The purpose of the IFS switch is to shutoff the fuel pump if a collision occurs. It consists of a steel ball held in place by a magnet. When a sharp impact occurs, the ball breaks loose from the magnet, rolls up a conical ramp and strikes a target plate which opens the electrical contacts of the switch and shuts off the electric fuel pump. Once the switch is open, it must be manually reset before restarting the vehicle. Refer to the Owner's Literature for the location of the IFS.
The FPDM receives a duty cycle signal from the PCM and controls the fuel pump operation in relation to this duty cycle. This results in variable speed fuel pump operation. The FPDM sends diagnostic information to the PCM on the fuel pump monitor circuit. For additional information on Fuel Pump Control and the Fuel Pump Monitor, refer to Fuel Systems in this section.
Electronic Returnless Fuel System (ERFS) The electronic returnless fuel system consists of a fuel tank with reservoir, the fuel pump, the fuel rail pressure (FRP) or fuel rail pressure temperature (FRPT) sensor, the fuel filter, the fuel supply line, the fuel rail temperature (FRT) sensor, the fuel rail, the fuel injectors, and a Schrader valve/pressure test point. For additional information on the fuel system components, refer to Engine Control Components in this section. Operation of the system is as follows:
  1. The fuel delivery system is enabled during crank or running mode once the PCM receives a crankshaft position (CKP) sensor signal.
  1. The fuel pump logic is defined in the fuel system control strategy and is executed by the PCM.
  1. The PCM commands a duty cycle to the fuel pump driver module (FPDM).
  1. The FPDM modulates the voltage to the fuel pump (FP) required to achieve the correct fuel pressure. Voltage for the fuel pump is supplied by the power relay or FPDM power supply relay. For additional information refer to Fuel Pump Control and Fuel Pump Monitor.
  1. The fuel rail pressure (FRP) sensor provides the PCM with the current fuel rail pressure. The PCM uses this information to vary the duty cycle output to the FPDM to compensate for varying loads.
  1. The fuel rail temperature (FRT) sensor measures the current fuel temperatures in the fuel rail. This information is used to vary the fuel pressure and avoid fuel system vaporization.
  1. The fuel injector is a solenoid-operated valve that meters the fuel flow to each combustion cylinder. The fuel injector is opened and closed a constant number of times per crankshaft revolution. The amount of fuel is controlled by the length of time the fuel injector is held open. The injector is normally closed and is operated by 12-volt VPWR from the power relay. The ground signal is controlled by the PCM.
  1. A pressure test point valve (Schrader valve) is located on the fuel rail and is used to measure the fuel injector supply pressure for diagnostic procedures and repairs. On vehicles not equipped with a Schrader valve, use the Rotunda Fuel Pressure Test Kit 134-R0087 or equivalent.
  1. There are 3 filtering or screening devices in the fuel delivery system. The intake sock is a fine, nylon mesh screen mounted on the intake side of the fuel pump. There is a fuel filter screen located at the fuel rail side of the fuel injector. The fuel filter assembly is located between the fuel pump and the pressure test point/Schrader valve.
  1. The fuel pump (FP) module is a device that contains the fuel pump and the fuel sender assembly. The fuel pump is located inside the reservoir and supplies fuel through the fuel pump module manifold to the engine and the fuel pump module jet pump.
  1. The inertia fuel shut-off (IFS) switch is used to de-energize the fuel delivery secondary circuit in the event of a collision. The IFS switch is a safety device that should only be reset after a thorough inspection of the vehicle following a collision.
Go to you tube , there are videos how this system works an to test it .

Nov 18, 2015 | Ford Cars & Trucks

1 Answer

I start the engine let it run when I give it gas it dies out


sound like your flooding the intake of the fuel and the car just dies.
depending type of fuel system you have, what year, pumping system, linkage, fuel pump, fuel injection, manual fuel pump, electric fuel pump, carburetor system, ## amount of cylinders you have.

Oct 02, 2015 | Cars & Trucks

1 Answer

I. Have a 2000 Lincoln town car I just replaced the fuel pump and fuel filter its reading 38lbs of fuel pressure it starts and shut off after a few seconds


Fuel pressure should be about 138psi or more. So there is a little animal called a fuel pump regulator that the ECU tells what the engine needs from the fuel pump, my guess is that is the problem, perhaps not the fuel pump. Low fuel pressure, in spite of DIY may be the fuel pressure regulator which if and appears to be bad would give you this low pressure. There should be ECU error codes that identify fuel system problems. Ask your favorite Auto parts store (nicely) to read the codes for you.

Apr 06, 2015 | Lincoln Cars & Trucks

1 Answer

Engen problem and missing


Sir, your question is not very clear, but I will still try to post a solution here. Engine missing could be due to any problem in fuel system, ignition system, engine or ECM as well.

LOW ENGINE IDLE SPEED (Poor idling):
-Throttle body (do the cleaning and idle speed learning)
-A /C signal circuit
-Fuel pump control circuit
-Fuel pump
-Intake system
-P C V valve (clogged or open) and hose

ROUGH IDLING:
-Cylinder Compression
-Ignition system (Igniters, spark plugs, wiring harness)
-Spark plug fouled, gap too wide or too short. (1.00-1.1 mm)
-Fuel injector circuit
-E C M power source circuit
-Fuel pump control circuit
-Fuel pump (required pressure 44 psi - 49 psi)
-Throttle body (cleaning)
-Intake system
-P C V valve and hose
-Air fuel ratio sensor
-Heated oxygen s ens or
-Mass air flow meter
-Idle hunting
-Throttle body
-Intake system
-P C V valve and hose
-Air fuel ratio sensor
-Mass air flow meter

HESITATION/ POOR ACCELERATION:
-Fuel pump control circuit
-Fuel pump
-Spark plug
-Ignition system
-Fuel injector circuit
-E C M power source circuit
-Mass air flow meter
-Throttle body (do cleaning)
-Intake system
-Valve timing
-Cylinder Compression


Jan 18, 2014 | 2008 Toyota Corolla

1 Answer

1994 Lincoln Town Car Fuel System Failure?


Is the fuel pump relay getting power from the EEC relay when you turn the key on ? And then is the fuel pump relay sending power to the pump ?

Jun 09, 2013 | 1994 Lincoln Town Car

2 Answers

Where is fuel pump for 1996 mercury mystique located on the car and how do you remove it


SPECIAL SERVICE TOOL(S) REQUIRED Description Tool Number Multi-Port Fuel Injection (MFI) Fuel Pressure Gauge T80L-9974-B
Removal
  1. Depressurize fuel system as outlined in Service Procedures- Fuel System Pressure Relief.
  1. Remove rear seat cushion. Refer to Section 01-10.
  1. Remove plastic grommet from floor pan.
  1. Disconnect fuel pump module electrical connector.
  1. NOTE: To disconnect fuel tubes from fuel pump module, compress tabs on both sides of each nylon push connect fitting and ease fuel tube out of fuel pump module.

    Disconnect fuel and vapor return tubes from fuel pump module.
  1. Turn fuel pump locking retainer ring counterclockwise using Fuel Tank Sender Wrench D84P-9275-A or equivalent and remove fuel pump locking retainer ring.
  1. NOTE: After fuel pump module removal, immediately cover fuel pump module opening in fuel tank in order to prevent fuel system contamination.

    Remove fuel pump module and cover fuel pump module opening in fuel tank.
  1. Remove fuel pump module O-ring seal and discard.
Installation
  1. NOTE: When cleaning fuel pump module mounting surface on fuel tank, use caution to prevent any foreign material from entering fuel system.

    Clean fuel pump module mounting flange and fuel pump module mounting surface and O-ring seal groove on fuel tank.
  1. Apply a light coat of Premium Long-Life Grease XG-1-C, -K or equivalent meeting Ford specification ESA-M1C75-B on a new O-ring seal to hold it in place and install it into the O-ring seal groove on the fuel tank.
  1. Install fuel pump module carefully to ensure that filter is not damaged. Make sure that locating keys are in keyways and O-ring seal remains in place.
  1. Hold fuel pump module in place and install fuel pump locking retainer ring finger-tight. Make sure that all locking tabs are under fuel tank lock ring tabs.
  1. Secure fuel pump locking retainer ring by rotating clockwise using Fuel Tank Sender Wrench D84P-9275-A or equivalent until fuel pump locking retainer ring rests against stops.
  1. Connect fuel and vapor return tubes to fuel pump module.
  1. Connect fuel pump module electrical connector.
  1. Install plastic grommet in floor pan.
  1. Install rear seat cushion. Refer to Section 01-10.
  1. Install Multi-Port Fuel Injection (MFI) Fuel Pressure Gauge T80L-9974-B as outlined in Service Procedures-Fuel System Pressure Relief.
  1. Turn ignition switch to RUN position for three seconds repeatedly (5 to 10 times) until pressure gauge reads at least 270 kPa (30 psi). Check for leaks at fittings.
  1. Remove pressure gauge, start engine and recheck for leaks.
Hope this helps

Aug 13, 2011 | 1996 Mercury Mystique

1 Answer

How do you replace fuel pump in lincoln navigator 2001


Fuel Pump Module Removal & Installation To Remove:
WARNING
Highly flammable mixtures are always present in any fuel related component. Smoking or carrying lighted tobacco or an open flame of any type may ignite the flammable mixtures.
WARNING
Even when the engine is not running, fuel in the fuel system remains under high pressure. Fuel system pressure must be relieved before working on or disconnecting any of the fuel lines, fuel tubes, or fuel system components. Failure to do so may result in accidental spraying of fuel, personal injury, or a fire hazard.
  1. Remove Fuel Tank. Fuel Pump ford-05-00-3947.gif

  2. Remove fuel pump lock ring.
  3. Remove fuel pump.
  4. Remove and discard fuel pump O-ring.
To Install:
  1. Install new fuel pump O-ring.
  2. Install fuel pump.
  3. Install fuel pump lock ring. Tighten to 66 ft-lb (89 Nm).
  4. Install Fuel Tank.
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Oct 29, 2010 | 2001 Lincoln Navigator

1 Answer

Where is the fuel pump located on a 92 Lexus SC300?


Fuel Pump REMOVAL AND INSTALLATION ES300 CAUTION
Fuel injection systems remain under pressure even after the engine has been turned OFF. The fuel system pressure must be relieved before disconnecting any fuel lines. Failure to do so may result in fire and/or personal injury.
  1. Relieve the fuel system pressure.
  2. With the ignition switch in the LOCK position, disconnect the negative battery terminal. If equipped with an air bag system, wait at least 90 seconds or longer before performing any other work.
  3. Remove the rear seat cushion.
  4. Disconnect the fuel pump connector. CAUTION
    The Supplemental Inflatable Restraint (SIR) system must be disarmed before removing the fuel pump. Failure to do so may cause accidental deployment of the air bag, resulting in unnecessary SIR system repairs and/or personal injury.
  5. Remove the floor service hole cover. NOTE: Do not lift the fuel pump assembly up using the wire harness.
  6. Remove the fuel filler cap. Disconnect the fuel outlet pipe and the return hose from the pump bracket.
  7. Remove the 8 screws and lift out the pump/bracket assembly with gasket.
  8. Remove the fuel pump lead wire.
  9. Pull the lower end of the pump off of the bracket.
  10. Disconnect the fuel hose from the pump and remove the pump.
  11. Remove the rubber cushion from the pump. To install:
  12. Install the filter and rubber cushion on the new pump and install the pump on the bracket.
  13. Connect the fuel hose and the wire connector on the pump.
  14. Using a new gasket, install the pump and tighten the eight screws to 35 inch lbs. (4 Nm).
  15. Connect the fuel pipe and return hose to the pump and tighten the bolts to 22 ft. lbs. (29 Nm).
  16. Connect the wire, install the service cover and replace the rear seat.
  17. Connect the negative battery cable.
  18. Start the engine and check for leaks. Fig. 1: Fuel pump assembly - ES300 294126.gif
GS300, LS400, SC300 and SC400
  1. Disconnect the negative battery cable. Wait at least 90 seconds before performing any other work.
  2. Remove the trunk floor mat.
  3. Remove the trunk trim cover.
  4. Disconnect the fuel pump electrical connector.
  5. Remove the rear seat bottom and seat back.
  6. Remove the partition cover.
  7. Remove the mounting bolts and remove the fuel pump set plate.
  8. Remove the three nuts and disconnect the fuel pump bracket from the tank.
  9. Disconnect the fuel hose from the bracket. Remove the pump, bracket and set plate as an assembly. To install:
  10. Install a new gasket on the set plate. Connect the fuel hose to the pump and bracket,
  11. Install the pump and bracket assembly with the three nuts; tighten the nuts to 48 inch lbs. (5 Nm). Install the set plate and tighten the bolts to 26 inch lbs. (3 Nm).
  12. Install the panel partition
  13. Install the rear seat cushion and back.
  14. Connect the fuel pump electrical connector.
  15. Install the trim panel.
  16. Install the spare tire and the trunk floor mat.
  17. Connect the negative battery cable.
  18. Start the engine; check the fuel system for leaks
  19. Road test the vehicle for proper operation.

Oct 13, 2010 | 1992 Lexus Sc 300

1 Answer

Does my 2000 ford expidition have a little compartment to replace my fuel pump.


Fuel Pump Module-in tank, no compartment to replace fuel pump Removal & Installation To Remove:
WARNING
Highly flammable mixtures are always present in any fuel related component. Smoking or carrying lighted tobacco or an open flame of any type may ignite the flammable mixtures.
WARNING
Even when the engine is not running, fuel in the fuel system remains under high pressure. Fuel system pressure must be relieved before working on or disconnecting any of the fuel lines, fuel tubes, or fuel system components. Failure to do so may result in accidental spraying of fuel, personal injury, or a fire hazard.
  1. Remove Fuel Tank. Fuel Pump ford-05-00-3947.gif

  2. Remove fuel pump lock ring.
  3. Remove fuel pump.
  4. Remove and discard fuel pump O-ring.
To Install:
  1. Install new fuel pump O-ring.
  2. Install fuel pump.
  3. Install fuel pump lock ring. Tighten to 66 ft-lb (89 Nm).
  4. Install Fuel Tank.
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Oct 12, 2010 | 2000 Ford Expedition

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