1994 saab900se. I have changed the fuel pump assembly,fuel pump,fuel filter and fuel pressure regulator and I still have to turn it over several times before it starts, also It sputters for a few minu

I believe it is part of the fuel pump, so if you are going to change out the filter you probably should change out the entire pump.

The pressure regulator/filter assembly is the very top subassembly in the fuel pump module. The filter is built into the regulator assembly.

searching why, (buy an FSM and no more guessing...? )
basic service?
low fuel pressure? why?

ive got near a 1/2 million + miles on jeeps since 1988.
never stranded, but i do my service,.
my last chick-o-dee. was 99. with 5sp, all with that.
my 08 JK same.
the fuel filters on old loop systems is in the front of the tank
then later, , EPA forced most parts into tank with the new loop
or dead head systems. (EPA wants fuel cold .so, that is it)
i dont find parts hard to find, jeeps excel at that. vast resources.
nor hard electrical if you had a 2007+ then that be different.

id just crawl under car and gander, at fuel line but here we go
ill do it , online for you.
4Liter 98
options , with the 20gallon tank there is filter. on top of pump , in tank.
that means to me there are different filters there. by size tank .
if you dont see a filter, that means its in the tank.
at
http://www.factorychryslerparts.com/productSearch.aspx?&ukey_make=1064&modelYear=1998&ukey_model=15525&ukey_trimLevel=0&ukey_driveline=0&ukey_Category=0&numResults=50&sortOrder=Relevance&isOnSale=0&isAccessory=0&isPerformance=0&searchTerm=

so

ill paste the FSM page on this topic

he fuel filter is an integral component of the fuel pressure regulator, which is mounted on top of the fuel pump module, located in the fuel tank. When the fuel filter/regulator assembly requires service, the fuel tank must be removed from the vehicle, however, the fuel pump module does not need to be removed.

1. Disconnect the battery ground cable.
2. Relieve the fuel system pressure. Refer to Section 5 for the proper procedure.
3. Remove the fuel tank assembly.
4. Clean the area around the fuel filter/regulator.
5. Disengage the retaining clamp from the top of the filter/regulator assembly. Discard the retaining clamp.
6. Using 2 small prying tools, pry the filter/regulator assembly out from the top of the fuel pump module. The filter/regulator assembly will unsnap from the fuel pump module.
7. Remove and discard the mounting gasket below the filter/regulator.
8. Before discarding the fuel filter/pressure regulator assembly, inspect the assembly to verify that the O-rings are intact. If the smallest of the 2 O-rings cannot be found on the bottom of the filter/regulator, it may be necessary to remove it from the fuel inlet passage in the fuel pump module.
9. Clean the recessed area in the pump module where the filter/regulator assembly is to be installed.
10. Check the replacement filter/regulator assembly to make sure that the new O-rings are already installed on the assembly.
11. Apply a small amount of clean engine oil to the O-rings.
12. Install a new gasket on top of the fuel pump module.
13. Press the new fuel filter/pressure regulator assembly into the top of the fuel pump module until it snaps into position (a positive click must be heard or felt).
14. The arrow on top of the fuel pump module should be pointed towards the front of the vehicle (12 O'clock position).
15. Turn the filter/regulator assembly until the supply tube (fitting) is pointed to the 11 O'clock position.
16. Install new retainer clamp (the clamp snaps over the top of the filter/regulator and locks to the flanges on the pump module).
17. Install the fuel tank assembly.
18. Connect the negative battery cable.
19. end

how is that ?

If the fuel pump check valve check valve is bad, the car may be unable to start. If the car does not start, turning the key so that it is one click away from starting, then repeating this process several times, may build up enough pressure so that the vehicle starts. If that is the case, the check valve is bad and needs to be replaced. check the fuel pressure regulater also. good-day ! If fuel pressure is low, disconnect the vacuum hose to the regulator. You should see an increase in pressure, if the regulator is not leaking. No change would indicate a bad regulator, check this first and get a fuel pressure reading on it to determine the pressure.

If you changed the fuel pump and the fuel filter and ignitor and regulator,in the list of changes do you know you have a EFI. The EFI main relay turn on the fuel pump which includes the circuit opening relay. Testing it mainly passes with flying colors just replace

IF YOU HAVE FUEL FILTER WITH FUEL PUMP ASSEMBLY YOU HAVE TO REPLACE FUEL PUMP ASSEMBLY REMOVE THE REAR SEAT BENCH IN ORDER TO REPLACE THE FUEL PUMP ASSEMBLY. NOW IF YOU HAVE FUEL PRESSURE REGULATOR AND FUEL FILTER AS ONE UNIT.BECAUSE FUEL PRESSURE REGULATOR BUILT TO THE FUEL FILTER.TO REPLACE FUEL FILTER, FIRST DEPRESSURIZE THE FUEL SYSTEM BY REMOVING THE FUEL PUMP RELAY LOCATED ON THE COWL.THEN CRANK ENGINE UNTIL IT DIES LACK OF FUEL.THE CRANK ENGINE OVER FEW TIMES TO MAKE SURE ALL FUEL OUT THE FUEL LINES.LOCATION OF FUEL FILTER UNDER THE VECHICLE MOUNTED TO THE LEFT SIDE OF THE CHASIS.

Hi.

Check the fuel filter and fuel pressure regulator. They are part of the same assembly and are located on top of the fuel pump. To replace the regulator # Disconnect fuel supply line at the Filter/Regulator nipple and releas locking spring tab (2 in diag.) on the regulator, then turn counterclockwise and pull out. To test regulator use a gauge like this in fuel lines:Pump Pressure Tester.
Pressure in 2003 should be 58psi (48 in 2001 engines). Pressure will drop of about ten psi when you start engine.

There is also an automatic shut down relay ASR. If problem is the ASR the pressure will go down when the relay cuts off power to pump. Read voltages and see if the problem is electrical first before going for the regulator.

The fuel filter is an integral component of the fuel pressure regulator, which is mounted on top of the fuel pump module, located in the fuel tank. When the fuel filter/regulator assembly requires service, the fuel tank must be removed from the vehicle, however, the fuel pump module does not need to be removed.

1. Disconnect the battery ground cable.
2. You dont have to relieve your fuel systems pressure because your jeep has an automatic bleeder.
   
3. Remove the fuel tank assembly.
4. Clean the area around the fuel filter/regulator.

Fig. Fig. 5: Remove the fuel filter/pressure regulator retaining clip from the top of the assembly

Fig. Fig. 6: Replace the old fuel filter/pressure regulator mounting gasket

1. Disengage the retaining clamp from the top of the filter/regulator assembly. Discard the retaining clamp.
2. Using 2 small prying tools, pry the filter/regulator assembly out from the top of the fuel pump module. The filter/regulator assembly will unsnap from the fuel pump module.
3. Remove and discard the mounting gasket below the filter/regulator.
4. Before discarding the fuel filter/pressure regulator assembly, inspect the assembly to verify that the O-rings are intact. If the smallest of the 2 O-rings cannot be found on the bottom of the filter/regulator, it may be necessary to remove it from the fuel inlet passage in the fuel pump module.

To install:

Fig. Fig. 7: Check the condition of the fuel filter/pressure regulator O-rings

1. Clean the recessed area in the pump module where the filter/regulator assembly is to be installed.
2. Check the replacement filter/regulator assembly to make sure that the new O-rings are already installed on the assembly.
3. Apply a small amount of clean engine oil to the O-rings.
4. Install a new gasket on top of the fuel pump module.
5. Press the new fuel filter/pressure regulator assembly into the top of the fuel pump module until it snaps into position (a positive click must be heard or felt).
6. The arrow on top of the fuel pump module should be pointed towards the front of the vehicle (12 O&rsquoclock position).
7. Turn the filter/regulator assembly until the supply tube (fitting) is pointed to the 11 O&rsquoclock position.
8. Install new retainer clamp (the clamp snaps over the top of the filter/regulator and locks to the flanges on the pump module).
9. Install the fuel tank assembly.
10. Connect the negative battery cable.

Get a fuel pressure gauge and connect it to the rail for the fuel injectors to read pressure.

If the pressure is too low, it might be a bad fuel pressure regulator or pump:

Fuel Pressure Regulator Removal & Installation 2.2L Engine To Remove:

1. Relieve the pressure in the fuel system.
2. Disconnect the negative battery cable.
3. Disconnect the vacuum hose from the fuel pressure regulator.
4. Remove the pressure regulator mounting screw.
5. Remove the fuel pressure regulator assembly with O-ring. Inspect filter screen for contamination. If contaminated, remove and discard.

Fuel pressure regulator removal/installation (2.2L SFI engine)

To Install:

1. Apply clean engine oil to the new pressure regulator O-ring and install the O-ring on the regulator.
2. Install the regulator on the fuel rail. Apply thread-locker to the mounting screw.
   • Tighten the screw to 106 lb in (12Nm).
3. Connect the negative battery cable.
4. Use the following procedure to pressurize the fuel system and check for leaks;
5. Turn the ignition ON for 2 seconds.
6. Turn the ignition OFF for 10 seconds.
7. Turn the ignition switch back ON to run the fuel pump again and pressurize the fuel system.
8. Check the fuel rail assembly for fuel leaks.

4.3L Engine RPO L35 To Remove:
4.3L (RPO L35) Fuel meter body assembly

1. Before servicing the vehicle, refer to the Cautions and Warnings in the beginning of this section
2. Remove or disconnect the following:
   • Upper intake manifold (See: Upper Intake Manifold)
   • Fuel pressure regulator retainer clip (M) and discard the clip
   • Regulator (N) from the housing by twisting and pulling the fuel pressure regulator (N) and using a shop towel to catch any spilled fuel
   • Regulator seal O-ring (R) and discard the O-ring seal
   • Regulator filter (Q) and discard the filter
   • Regulator seal O-ring (P) and discard the O-ring seal
   • Backup ring (O) and discard the ring
3. Cover the fuel pressure regulator housing to prevent contamination from entering the fuel system

To Install:
4.3L (RPO L35) Fuel meter body assembly

1. Lubricate the NEW O-ring seals with clean engine oil
2. Assemble the following new parts to the fuel pressure regulator:
   • Backup ring (O)
   • Regulator seal O-ring (P)
   • Regulator filter (Q)
   • Regulator seal O-ring (R)
3. Install or connect the following:
   • Fuel pressure regulator with the vacuum tube pointing down
   • Fuel pressure regulator retainer clip (M)
   • Upper manifold
4. Test drive the vehicle to confirm the repairs

RPO LU3 To Remove:
4.3L (RPO LU3) Fuel meter body assembly

1. Before servicing the vehicle, refer to the Cautions and Warnings in the beginning of this section
2. Remove or disconnect the following:
   • Upper intake manifold
   • Fuel pressure regulator retainer clip (E)
   • Regulator (F) from the housing by twisting and pulling the fuel pressure regulator (F) while using a shop towel to catch any spilled fuel
   • Regulator seal O-ring (J) and discard the O-ring seal
   • Regulator filter (I) and discard the filter
   • Regulator seal O-ring (H) and discard the seal
   • Backup ring (G) and discard the backup ring
3. Cover the fuel pressure regulator housing to prevent contamination from entering the fuel system

To Install:
4.3L (RPO LU3) Fuel meter body assembly

1. Lubricate the NEW O-ring seals with clean engine oil.
2. Assemble the following new parts to the fuel pressure regulator:
   • Backup ring (G)
   • Regulator seal O-ring (H)
   • Regulator filter (I)
   • Regulator seal O-ring (J)
3. Install or connect the following:
   • Fuel pressure regulator (F) with the vacuum tube pointing down
   • Fuel pressure regulator retainer clip (E)
   • Upper intake manifold
4. Test drive the vehicle to confirm the repairs

Pressure regulator could be a factor, but may be part of the fuel pump assembly. Fuel filter could be a factor, but again, with some Chrysler vehicles the filter, regulator and such are all part of the fuel pump assembly.

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.



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




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




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




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)



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...