How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask George H. Your Own Question

George H.
George H., ASE Certified Technician
Category: Chevy
Satisfied Customers: 16054
Experience:  GM Tech ASE Master Tech 15+ years
13574682
Type Your Chevy Question Here...
George H. is online now
A new question is answered every 9 seconds

1989 chevy s10 pickup fuel system- fuel pressure regulator

Customer Question

1989 chevy s10 pickup fuel system- fuel pressure regulator replacement. Do you need to replace fuel meter cover assembly which contains the pressure regulator or can you just replace the regulator? If so is there a special procedure?
Submitted: 5 years ago.
Category: Chevy
Expert:  George H. replied 5 years ago.

Hello I will help you with your question,

 

You will just replace the diaphragm if it is leaking,

 

 

graphic

 

NOTE: To prevent leaks, the pressure regulator diaphragm assembly must be replaced whenever the cover is removed.

WARNING: The pressure regulator contains a large spring under heavy compression. Use care when removing the screws to prevent personal injury.

REMOVAL:

  1. Remove the four pressure regulator attaching screws, while keeping the pressure regulator compressed.
  2. Remove the pressure regulator cover assembly.
  3. Remove the pressure regulator spring.
  4. Remove the spring seat.
  5. Remove the pressure regulator diaphragm assembly.

INSPECTION:

Inspect the pressure regulator seat in the fuel meter body cavity for pitting, nicks, or irregularities. (Use a magnifying glass if necessary.) If any of the above is present, the whole fuel body casting must be replaced.

INSTALLATION:

  1. Install a new pressure regulator diaphragm assembly, making sure it is seated in the groove of the fuel meter body.
  2. Install the regulator spring seat and spring into cover assembly.
  3. Install the cover assembly over the diaphragm, while aligning mounting holes. NOTE: Use care while installing the pressure regulator to prevent misalignment of the diaphragm and possible leaks.
  4. Install the four screw assemblies that have been coated with the appropriate thread locking compound, while maintaining pressure on the regulator spring. Tighten the screw assemblies to 2.5 Nm (22.0 lb-in).
  5. With the engine OFF and the ignition ON, check for fuel leaks.

 

This information is for the 2.5L engine the others are similar. If you need specific info and you do not have the 2.5L please post the engine size

 

Let me know if you have additional questions

 

Thank you

 

 

George H., ASE Certified Technician
Category: Chevy
Satisfied Customers: 16054
Experience: GM Tech ASE Master Tech 15+ years
George H. and 5 other Chevy Specialists are ready to help you
Customer: replied 5 years ago.

thank you George

three questions,

1- Inspection- replacing the whole fuel body casting? Would that be the pressure regulator cover, spring seat and spring? Or the entire fuel meter cover assembly containing a new pressure regulator?

 

2-Installation#4-Installing four screws to pressure regulator cover coat with appropriate locking compound? Medium strength- loctite blue OK? High Strength-loctite red OK? Which One? Is the loctite brand ok?

 

3-I have the 2.8 litre motor is the procedure the same?

Expert:  George H. replied 5 years ago.

Hello, Your reply did not show up in the list of my questions so I am sorry for not replying sooner.

 

Your 2.8L is serviced differently than the 2.5L. If you are replacing the regulator due to bleedoff after the pump is shutoff be aware that there is a bleed orifice that will allow pressure to reduce after the pump is turned off and this is normal operation.

 

With that being said your diaphragm is serviced with the fuel meter cover and the regulator is included in the cover

 

 

 

 

 

graphic

 

The pressure regulator is a diaphragm-operated relief valve with system operating pressure on one side and and atmospheric pressure on the other side. The function of the regulator is to maintain a constant pressure to the injectors at all times, by controlling the flow in the return line by means of a calibrated bypass.

NOTE: The pressure regulator on this unit is serviced as part of the fuel meter cover and should not be disassembled.

 

 

To service the cover

 

graphic

 

NOTE: The fuel meter cover assembly contains the fuel pressure regulator assembly. The regulator has been adjusted at the factory and should only be serviced as a complete assembly.

WARNING: DO NOT remove the four screws securing the pressure regulator to the fuel meter cover. The fuel pressure regulator includes a large spring under heavy compression which, if accidently released, could cause personal injury. Disassembly might also be result in a fuel leak between the diaphragm and the regulator container.

REMOVAL:

  1. Disconnect electrical connectors to fuel injectors. (Squeeze plastic tabs and pull straight up).
  2. Remove long and short meter cover screw assemblies.
  3. Remove fuel meter cover assembly. NOTE: DO NOT immerse the fuel meter cover (with pressure regulator) in cleaner, as damage to the regulator and gasket could occur.
  4. Remove fuel meter outlet gasket and pressure regulator seal. Discard old gaskets and seal.

INSPECTION:

  • Inspect for dirt, foreign material and casting warpage.

INSTALLATION:

  1. Install a new pressure regulator seal, fuel meter outlet passage gasket, and cover gasket.
  2. Install fuel meter cover assembly.
  3. Install attaching screw assemblies, precoated with appropriate locking compound to threads. (Short screws are next to injectors.) Tighten screw assemblies to 3.0 Nm (28.0 lb-in).
  4. Reconnect electrical connectors to fuel injectors.
  5. With engine OFF, and ignition ON, check for leaks around gaskets and fuel line couplings.

 

 

 

 

The thread locker is blue locktite

 

Sorry for the delay

 

 

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
< Last | Next >
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
< Last | Next >
  • http://ww2.justanswer.com/uploads/TI/tim37857/2011-10-28_23053_S6301814.64x64.JPG Tim's Auto Repair's Avatar

    Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
  • http://ww2.justanswer.com/uploads/DT/dt69nova/2012-6-15_234154_pic1.64x64.jpg Dave Nova's Avatar

    Dave Nova

    Chevrolet Technician

    Satisfied Customers:

    6870
    ASE Master Certification. GM World Class Certification
  • http://ww2.justanswer.com/uploads/ggrote1/2009-06-27_031011_me.jpg Gary's Avatar

    Gary

    Chevy Technician

    Satisfied Customers:

    5404
    15 years GM master tech
  • http://ww2.justanswer.com/uploads/testedtuff/2009-09-26_170108_pictures.jpg John's Avatar

    John

    Master A.S.E Automotive technician

    Satisfied Customers:

    4071
    A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
  • http://ww2.justanswer.com/uploads/RO/rodcuda/2011-7-25_224114_Donhoff1.64x64.JPG Neal's Avatar

    Neal

    Chevy Mechanic

    Satisfied Customers:

    2306
    Shop Owner and Mechanic on multiple makes.
  • http://ww2.justanswer.com/uploads/goodwrench9124/2008-11-09_220838_dscf0007.jpg goodwrench9124's Avatar

    goodwrench9124

    ASE Certified Technician

    Satisfied Customers:

    2041
    Ase Master Certified, GM Master Certified Tech. Awarded GM Top performer, Hybrid certified
  • http://ww2.justanswer.com/uploads/DR/drivefast1971/2012-1-12_172422_0009051tQKh.64x64.jpg Ron Z.'s Avatar

    Ron Z.

    - Chevy Tech -

    Satisfied Customers:

    1912
    18+yrs experience. State Inspector and Chevy Diagnostics
 
 
 
Chat Now With A Chevy Mechanic
George H.
George H.
Technician
1495 Satisfied Customers
GM Tech ASE Master Tech 15+ years