Question about 1998 Chevrolet Tahoe

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Vacuum line for fuel pressure regulator 98 Tahoe

The Tahoe is not starting without putting starting fluid in the carburator. baought a fuel pressure regulator to replace the old one, but can't find where to attach the vacuum hose from the regulator to

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  • terryjva May 31, 2009

    thanks - just 2 years ago replaced the fuel pump. The old regulator did not have a hose connected, but there is a place for one. Couldn't find the hose, so I guess it just doesn't need one.

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Was there a hose on the old one? If not, you don't have one. It is most likely your fuel pump if you are not getting fuel.

Posted on May 31, 2009

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Fuel pressure needs to be 60 psi key on not running and should hold this pressure for 5-10 minutes or more if it drops as soon as you turn the key off lean towards the fuel pressure regulator being bad' I'm looking at the fuel pump though. If you have less than the 60 psi it won't start on it's own but once started will run on as little as 15-20 psi.

Posted on Dec 16, 2014

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1 Answer

2001 chevy tahoe. the fuel pressure regulator making alot of noise. it is a new regulator. the engine is stalling. could this be the cause if the stalling


Yes it could be the cause. Make sure you have a good engine vacuum signal to the fuel pressure regulator, I suggest you replace the vacuum hose as well as a poor vacuum signal from the engine will cause the regulator diaphragm to "vibrate" and be noisey, this plays heck with the fuel pressure and this may be why the stall.

Dec 08, 2016 | 2001 Chevrolet Tahoe

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Its a 1999 chevy tahoe. Changed fuel pump twice.


Could be the pressure regulator on the fuel rail. Pull the vacuum line off the regulator and check it for fuel contamination. There should not be gas in the line. If there is fuel in that line the regulator is bad and needs replaced.

Sep 15, 2014 | 1999 Chevrolet Tahoe

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1995 chevy tahoe 4wd. 5.7 liter when cooled down, starting is normal . Right after, engine almost stalls but Idle air control kicks in and keeps it running. eventually it is idling but rouph. On...


If your vehicle has one, and I think it does, check your EGR system. If the egr valve is full of carbon, it can be partially open, creating a vacuum leak. If the egr valve solenoid is bad, it could be opening the valve at the wrong time, also creating a vacuum leak. Unplug the egr vacuum hose, plug the open end of the hose and start it and see what it does. A picture of the egr is below.
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Mar 11, 2017 | 1995 Chevrolet Tahoe

1 Answer

How to install a fuel presure regulator on a 1998 chevrolet tahoe


Fuel Pressure Regulator - REMOVAL & INSTALLATION
(see Figure 1)
  1. Disconnect the negative battery cable.
  2. Relieve fuel system pressure.
  3. Disconnect the ignition coil.
  4. Remove the upper intake manifold.
  5. Disconnect the vacuum line to the regulator.
  6. Remove the snapring from the regulator housing.
  7. Place a towel under the regulator to absorb any spilled fuel and remove the pressure regulator from the fuel rail socket.
  8. Remove the pressure regulator from the fuel rail.
  9. Remove the pressure regulator O-ring filter, O-ring backup and O-ring and discard them.
zjlimited_1663.jpg

Fig. 1: Exploded view of the pressure regulator assembly-MFI systems



To install:

  1. Before installing the O-rings, lubricate them with clean engine oil and install them on the regulator inlet as a complete assembly.
  2. Install the snapring retainer into the slot on the regulator housing.
  3. Connect the vacuum line to the regulator.
Ensure that the retainer is properly seated in the slot in the regulator housing. Pull on the regulator to make sure that it is properly seated.
  1. Connect the negative battery cable.
  2. Turn the ignition ON for 2 seconds and then turn it OFF for 10 seconds. Again turn the ignition ON and check for leaks.
  3. Install the manifold plenum.
Hope this helps.

Aug 02, 2011 | 1998 Chevrolet Tahoe

1 Answer

I have a 2004 Tahoe which has misfire problems (P0300). I changed the plugs, wires, fuel filter and air filter but problem still exist. The 4 plugs on the passenger side continue to file out and become...


Removal & Installation of fuel Regulators on
4.8L, 5.3L & 6.0L Engine To Remove:
CAUTION
Three styles of fuel pressure regulators and fuel rails will be used in this model year. Each regulator has a different "footprint" that consequently changes the size of the receiving port in the fuel rail. The regulator retaining clips are specific to each rail-regulator design and cannot be interchanged.
chevy_aval15_02-04_fuelrail.gif

  1. Remove the engine sight shield.
  2. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure.
  3. Clean the fuel pressure regulator retainer and the surrounding area.
  4. Remove or disconnect the following:
    • Fuel pressure regulator vacuum line.
    • Fuel pressure regulator retainer.
    • Fuel pressure regulator.
  5. Remove the following parts from the fuel rail:
    • Backup ring (10)
    • Regulator Seal O-ring (11)
    • Regulator filter (12)
    • Regulator seal O-ring (13)
To Install:
chevy_aval15_02-04_retainer.gif

  1. Make sure the NEW fuel pressure regulator retainer is the right one.
  2. The tabs (1) are used on the straight vacuum port retainer (2), and the E85-straight vacuum port retainer (3).
  3. The angle vacuum port retainer (4) has no tabs. chevy_aval15_02-04_fuelrail.gif

  4. Install the following parts onto the fuel pressure regulator (9).
    • Backup ring (10)
    • Regulator seal O-ring (11)
    • Regulator filter (12)
    • Regulator seal O-ring (13)
  5. Lubricate the fuel pressure regulator O-rings with clean oil.
  6. Install the fuel pressure regulator and retainer. CAUTION
    Whenever the fuel pressure regulator is removed from the fuel rail NEW O-rings and a NEW retaining clip should be used on reinstallation.
  7. Connect the vacuum line.
  8. Tighten the fuel filler cap.
  9. Use the following to inspect for leaks:
    • Turn ON the ignition, with the engine OFF, for 2 seconds.
    • Turn OFF the ignition for 10 seconds.
    • Turn ON the ignition, with the engine OFF.
    • Install the engine sight shield.
8.1L Engine To Remove:
Fuel pressure regulator vacuum line gm_trk_sub15_fuel_press_reg_vac_line.gif

  1. Before servicing the vehicle refer to the precautions at the beginning of thjs section
  2. Remove the fuel injector sight shield as needed
  3. Relieve fuel system pressure (See: Fuel Pressure Relieving)
  4. Disconnect the fuel pressure regulator vacuum line (A) 8.1L Fuel pressure regulator retainers gm_trk_sub15_81l_fuel_press_reg_retainers.gif

  5. Clean any dirt from the fuel pressure regulator retainer and the surrounding area
  6. Remove the fuel pressure regulator retainer (I)
  7. Remove the fuel pressure regulator (H) from the fuel pressure regulator housing
To Install:
8.1L Fuel pressure regulator retainers gm_trk_sub15_81l_fuel_press_reg_retainers.gif

  1. Install or connect the following:
    • Backup ring (J) on the fuel pressure regulator (H)
    • New large O-Ring (K) on the fuel pressure regulator
    • Regulator filter (L) on the fuel pressure regulator
    • New small O-Ring (M) on the fuel pressure regulator
  2. Lubricate the fuel pressure regulator large O-Ring and the small O-Ring with clean engine oil
  3. Push the fuel pressure regulator onto the regulator housing on the fuel rail
  4. Install a new fuel pressure regulator retainer (I)
  5. Install or connect the following:
    • Fuel pressure regulator vacuum line
    • Negative battery cable
  6. Tighten the fuel filler cap
  7. Inspect for leaks using the following procedure:
    • Turn on the ignition with the engine off for two seconds
    • Turn off the ignition for 10 seconds
    • Turn on the ignition with the engine off
    • Inspect for fuel leaks
  8. Install the fuel injector sight shield
  9. Road test the vehicle to check performance
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Sep 02, 2010 | Chevrolet Tahoe Cars & Trucks

2 Answers

99 tahoe 5.7 wont start


your fuel pressure is suppose to be 60 - 66 psi. first replace fuel filter.and check vacuum line going to fuel pressure regulator.make sure vacuum is going to vacuum line.if changing fuel filter dont help. fuel pump could be faulty.

Dec 14, 2009 | 1999 Chevrolet Silverado 1500

2 Answers

01 Tahoe won't start on first try


Fuel pump or the fuel pressure regulator are the most common problems.

Oct 08, 2009 | 2000 Chevrolet Tahoe

1 Answer

My 1997 won't start without starter fluid. I can hear the fuel pump working at start up and after I start it with starter fluid it drives fine and will start on it's own if I drive it for more then 10...


I have a 98 that had the same problem and it was my intake that was bad, I would try replacing the regulator first you can pick one up for about $53.00 at your local parts store. If thats not the problem get your fuel pressure checked it should be around 60 to 65 PSI.

Oct 06, 2009 | 1997 Chevrolet Tahoe

1 Answer

1997 Tahoe wont start, has spark, and fuel pump works


Your Tahoe does have a vacuum line connection to the regulator. It's also possible the regulator itself is bad,
Greg

Jun 11, 2009 | 1999 Chevrolet Tahoe

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