Question about 1993 Dodge Dakota

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Fuel pump kicks on but not getting fuel to fuel rail

I put a new fuel pump in and a new regulator in, but still will not turn over. and without the regulator in place, i have fuel to there.

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Did anyone read the post all the way he said the fuel pump turns on but he's not getting any fuel pressure to the test port on the fuel rail

Posted on Jul 24, 2019

  • Jesse west
    Jesse west Jul 24, 2019

    Did anyone read the post all the way he said the fuel pump turns on but he's not getting any fuel pressure to the test port on the fuel rail

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Check fuel pressure at test port, fuel filter and inspect the whole fuel line for kinks & crimps. If that doesn't work disconnect the fuel filter then use high pressure air to blow from the pressure regulator to the removed filter to ensure that the line is clear and open. Hook everything back up and check for pressure.

Posted on Feb 22, 2013

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Posted on Jan 02, 2017

mcgyver468

Mark L. Roberts Jr.

  • 710 Answers

SOURCE: ran yesturday, tried today no fuel in lines, or pressure in rail, fuel pump not activating

Check the fuel pump fuse and relay under the hood in the fuse panel. If both fuse and relay are good then fuel pump may be at fault, but it seems too new for a fuel pump replacement. Hope this helps. Keep me posted please. Good luck

Posted on Apr 28, 2009

lynnh001

  • 474 Answers

SOURCE: My daughter has a 2000 Dodge Caravan 3.8..Its got

When you turn on the ignition to start vehicle can you hear a buzzing sound coming from the rear of the vehicle. That sound is the fuel pump pressurizing the fuel system. If you do not hear that noise then the pump is not working. Check fuel pump connection for power, if no power check fuse, relay and ground

Posted on Jul 29, 2010

mike huskisson

  • 565 Answers

SOURCE: I was told by a technician friend at a local Dodge

not sure what your problem actually is. wont start? if you have that pressure at the test port your fuel is pumping fine. need to see if the injectors are pulsing. this is done by removing the easiest injector plug and installing a noid lite. you can get the noid lite at your local parts store. if there is no rapid flashing when trying to crank most likely problem is either the crank sensor or cam sensor. hope this helps

Posted on Jan 20, 2011

bonedivers

Steve Newton

  • 1140 Answers

SOURCE: 89 dodge dakota with a 3.9L. Isnt getting fuel.

in the gas tank, sounds like bad pump

Posted on May 28, 2011

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1 Answer

Just put a new delphi fuel pump in my1996 grand caraban did this twice. Still im geting no pressure at the shrader vaulve. Van runs on either. The pump and regulator are the same assembly is the pump the...


Not likely. It is also not likely that the regulator is in the fuel pump assembly. Some people mistake the check valve in the pump as a regulator. Also, some vehicles have a pump module which includes the fuel gauge sensor and that can be mistaken as the regulator by some DIYers. The caravan uses a return-loop fuel system. This means that the pump is cycling fuel from the tank to the fuel rail on one line and the fuel that is not needed at the injectors flows back through another line to the fuel tank. This is done to prevent the pump from building up too much pressure and allows the fuel flowing through the pump to keep it cool. Because of the looping system, there needs to be a flow restrictor (aka regulator) at the fuel rail to provide a constant pressure source for the injectors. The regulator is normally at the end of the rail and will have a vacuum line attached. Pull the vacuum line, place a rag at the vacuum port, and crank the engine. There should be no fuel coming out the port. If any fuel comes out of the vacuum port, the regulator is faulty. The regulator could still be faulty even if there is no fuel from the port, but fuel leakage is an easy way to be sure. If the regulator is not providing proper restriction to maintain pressure, then the fuel simply flows in a circular loop from and back to the fuel tank without enough pressure to allow the injector to do their thing,

Nov 07, 2014 | 1996 Dodge Grand Caravan

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My car wontturn over in the morning. I changed to fuel pump and fuel filter. It cranks but wont turn over, then after a while it starts. What could be causing this


Fuel pressure regulator is a good place to look. look at the extra injector that enrichens the mixture on a cold engine too.

Aug 21, 2014 | 1999 Cadillac DeVille

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I need change the fuel pump


Hi, The fuel pump is in the tank. You will have to remove the tank to get at it. Good luck

Jun 21, 2011 | 1995 Ford Windstar

1 Answer

Need step by step inst. to replace fuel pressure reg.


  1. First, you will need to depressurize your fuel system. Remove the Fuel Pump Relay, start the vehicle and run until it shuts off, should only take a few seconds.
  2. The Fuel Pressure Regulator is held in place on the Fuel Rail using a Retaining Ring, or Snap Ring.
  3. You will need to remove the Vacuum Hose connected to the Fuel Pressure Regulator before you remove the retaining ring.
  4. You need a pair of Snap Ring Pliers to remove this retaining ring.
  5. Once the retaining ring is removed, slide the old Fuel Pressure Regulator out, and install the new one. Lubricate the O rings on the new part and the fuel line before assembly.
  6. After reinserting the Snap Ring, ensure that it is snapped in place completely.
  7. Reinstall the Vacuum hose and reconnect your Fuel Pump Relay. Turn the Ignition to On, and check for leaks around the Fuel Pressure Regulator.
  8. If no leaks are found, proceed to start the vehicle.


I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

Mar 15, 2011 | 1998 GMC Jimmy

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1998 gmc jimmie 4.3, 2 wd. wont start. getting no gas at the fuel bleeder valve. has new fuel pump and new fuel filter. started and ran fine after new pump and filter install. drove 15 miles and parked all...


Check to see if fuel is getting to the filter. Maybe too much dirt in lines & plugged filter? If fuel at filter, put hose in place of filter JUST LONG enough to see if fuel is getting to fuel rail.

Mar 15, 2011 | 1998 GMC Jimmy

1 Answer

I put a new fuel pump in my 97 concorde, it ran just fine all the way home, but in the morning i wouldnt start. i put another pump in and the same thing happend. could this be a short somewhere?


Well, the fuel pump relay may not be getting electricity to the fuel pump.

Also, use the following procedure to test the fuel pump before changing it again:

TESTING Fig. 1: Connect the fuel pressure gauge C4799B or equivalent to the fuel rail service valve - 3.3L shown 88175g09.gif
Fig. 2: Checking the fuel pressure with a gauge - 3.5L shown 88175g10.gif
Fig. 3: Checking the pressure between the pump and the filter 88175g11.gif
Fig. 4: Place the other end of the adapter 6668 into an approved gasoline container 88175g12.gif
  1. Release the fuel system pressure as described in earlier in this section.
  2. Remove the protective cover from the service valve on the fuel rail.
  3. Connect fuel pressure gauge C-4799B or equivalent to the fuel rail service valve.
  4. Place the ignition key in the ON position. Using the DRB III tester or equivalent, access the ASD fuel system test. (The ASD fuel system test will activate the fuel pump and pressurize the system.)
  5. If the gauge reading equals the specifications, then further testing is not required. Without vacuum applied to the regulator, the 3.3L engine fuel system operates at 55 psi (379 kPa). With the engine idling and the manifold vacuum applied to the regulator, the system operates at approximately 46 psi (317 kPa). Without vacuum applied to the regulator, the 3.5L engine fuel system operates at 48 psi (331 kPa). With the engine idling and the manifold vacuum applied to the regulator, the system operates at approximately 39 psi (269 kPa). The fuel system pressure varies with the different amounts of manifold vacuum applied to the regulator. If the pressure is not correct, record the pressure and remove the gauge.
  6. Ensure that the fuel does not leak from the fuel rail service valve. Install the protective cover onto the fuel rail service valve.
  7. If the fuel pressure reading was below the specifications, test the system according to the following procedure:
    1. Perform the fuel pressure release procedure.
    2. Install a fuel gauge C4799 and fuel adapter 6631 or equivalent in the fuel supply line between the tank and the fuel filter.
    3. Using the DRB III scan tool or equivalent, with the ignition key in the ON position, repeat the ASD fuel system test.
  8. If the pressure is at least 5 psi (1 kPa) or higher than the reading recorded, replace the fuel filter.
  9. If no change is observed, gently squeeze the return hose. If the pressure increases, replace the pressure regulator. If the gauge reading does not change when the return hose is squeezed, the problem is either a plugged inlet strainer or defective fuel pump.
  10. If the fuel pressure reading was above the specifications test the system according to the following procedure:
    1. Perform the pressure release procedure.
    2. Install fuel pressure gauge C4799 and adapter 6631 or equivalent in the fuel supply line between the fuel tank and the fuel filter.
    3. Remove the fuel return line hose from the pump at the tank. Connect pressure test adapter 6668 or equivalent to the return line. Place the other end of adapter 6668 into an approved gasoline container. A minimum of 2 gallon tank should be sufficient. All return fuel will flow into the container.
    4. Using the DRB III scan tool or its equivalent, with the ignition key in the ON position, repeat the ASD fuel system test.
  11. If the pressure is now correct, replace the fuel pump.
  12. If the pressure is still above specifications, remove the fuel return hose from the chassis fuel tubes (at the engine) and attach fuel pressure test adapter 6668 or equivalent to the return tube. Place the other end of the hose in the clean container, repeat the test. If the pressure is now correct, check for a restricted fuel return line. If there is no change observed, replace the fuel pressure regulator.
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Oct 08, 2010 | 1997 Chrysler Concorde

3 Answers

2000 Malibu Starts then looses fuel pressure I have replaced the fuel pump and the fuel pump relay still same problem


Keep in mind that you have several components there:
- Fuel Pump Sender Assembly,
- Fuel Pressure Regulator,
- Fuel Rail Assembly, and
- Fuel Injectors.

1.- Fuel Pump (Sender Assembly) - TESTING
Refer to the accompanying charts for fuel pump diagnosis and testing.

The fuel injection system remains 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.

eb744a2.jpg

Fig. 3.1L engine OBD system check to be done before fuel pump relay circuit diagnosis


26456ba.jpg

Fig. 3.1L engine fuel pump relay circuit diagnosis (1 of 2)


b3b739d.jpg

Fig. 3.1L engine fuel pump relay circuit diagnosis (2 of 2)


db78a73.jpg

Fig. View of the fuel pressure test port (Schrader valve)-3.1L engine

A - 3.1L engine fuel system pressure test (1 of 4)
B - 3.1L engine fuel system pressure test (2 of 4)
C - 3.1L engine fuel system pressure test (3 of 4)
D - 3.1L engine fuel system pressure test (4 of 4)

c8a9798.jpg

Fig. The fuel pump/fuel sender module assembly is mounted in the fuel tank


2.-
Fuel Pressure Regulator - REMOVAL & INSTALLATION

(the fuel pressure regulator, which is located on the fuel rail assembly)

NOTE:
Before removing the fuel regulator assembly, place a clean shop towel under the regulator to catch any fuel drips

  1. Properly relieve the fuel system pressure.
  2. If not done already, disconnect the negative battery cable.
  3. On the 3.1L engine, remove the intake manifold plenum, as outlined in .
  4. On the 2.4L engine, remove the fuel rail. Refer to procedure earlier in this section.
  5. Detach the vacuum line from the regulator.
  6. Place a shop towel under the regulator to catch any fuel that may drip out. Unfasten the fuel pressure regulator retaining screw, then remove the regulator by twisting and pulling it from the fuel rail.
  7. Remove and discard the O-ring seal. Inspect the filter screen for contamination and replace if necessary.
To install:
  1. Prior to assembling the pressure regulator to the fuel rail, lubricate the new rail-to-regulator O-ring seal with clean engine oil.
  2. Place the O-ring on the pressure regulator and install the pressure regulator to the fuel rail.
  3. Install the retainer or coat the regulator mounting screws with an approved thread locking compound and secure the pressure regulator in place. Tighten the mounting screw to 76 inch lbs. (8.5 Nm).
  4. If removed, install the fuel rail assembly to the engine.
WARNING The fuel return pipe must be connected before tightening the regulator retaining screw to prevent the regulator from rotating. Rotation of the regulator could damage the retainer and spacer bracket and lead to a fuel leak at the regulator inlet.
  1. Connect the fuel feed line and return line to the fuel rail assembly, use a backup wrench on the fittings to prevent turning.
  2. Attach the vacuum line to the regulator.
  3. On the 3.1L engine, install the intake manifold plenum.
  4. Connect the negative battery cable. Turn the ignition to the ON position for two seconds, then turn it to the OFF position for ten seconds. Turn again to the ON position and check for fuel leaks.

continue...

May 24, 2010 | Chevrolet Malibu Cars & Trucks

1 Answer

2003 nissan altima turns over but will not start. 108000 mi. Put in new fuel pump thinking most likely. Can hear pump working.


fuel pressure regulator in engine area may be bad--chec plug wires for wear as well as coils--rent a scanner from parts place and look up any codes in a manual

May 21, 2010 | 2003 Nissan Altima

1 Answer

Nissan 300ZX Fuel problem


I had an 82 280zx and now a 90 300zx, in both cars the fuel pump relays were located in the engine compartment, in the fuse boxes, as long as you can read the covers over the fuses, they are clearly marked.
2nd no fuel at filter would either be faulty pump or relay. All that the regulator does is regulate the pressure to the injectors and keep them consistant.

Dec 31, 2008 | 1990 Nissan 300ZX

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