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 BOBBYSS Your Own Question

BOBBYSS
BOBBYSS, Master Technician
Category: Chevy
Satisfied Customers: 14275
Experience:  ASE MASTER CERTIFIED, AA DEGREE AUTO/DIESEL TECH
Type Your Chevy Question Here...
BOBBYSS is online now
A new question is answered every 9 seconds

2002 Chevy suburban 1500: wont start..crank sensor..fuel pressure

Customer Question

2002 Chevy Surburban 1500 w/flex fuel won't start, will crank but will die, cam position sensor, fuel pump and relay, crank sensor all changed. changed out fuel pump and truck started ran about 20 min till we shut it off then would not start again, gas gauge not working before or after replacing fuel pump. Did a fuel pressure test was 50 before changing the pump. Plugged in the OBD code reader when we got the truck started and it freezes and will not read any codes. low fuel and battery low light on instrument panel.  Also checked all fuses and relays.
Submitted: 2 years ago.
Category: Chevy
Expert:  BOBBYSS replied 2 years ago.

BOBBYSS : Hello jacustomer, does the fuel pump make a buzzing noise when turning the key on?
Customer :

Let me check husband in shower hang on a sec

Customer :

fuel pump does buzz for about 3 seconds he said

BOBBYSS : Okay, and when it buzzes what is the fuel pressure? Is the security light on or flashing when cranking the engine?
Customer :

on the new pump haven't tested it .yet as we need to rent the tester again on the old pump it was 50.Security light on

Customer :

battery is dead again can't check unless we jump it again.

Customer :

battery is new and was working fine before the truck stopped running

Customer :

connections on battery are tight security light flashing now

BOBBYSS : Okay, pressure needs to be above 55 psi. It may be a bad fuel pressure regulator. It is located on the fuel rail next to the injectors on the top of the engine. Pull off the vacuum line on it and turn the key on. If fuel comes out of the regulator it is bad. If not then the security system may need to be reset. Also, I hope that the fuel pump connector was replaced with the fuel pump.
Customer :

Yes fuel pump connector replaced

Customer :

fuel does come out of the fuel pressure regulator

Customer :

we did replace the fuel pressure regulator 2 weeks prior to truck dying could it have been defective?

BOBBYSS : Yes, as no fluid should come out of the vacuum line hole.
Customer :

no fuel comes out of the line only when we pull the regulator off

Customer :

fuel comes out of the regulator hole where the regulator sets

Customer :

Could the flex fuel sensor cause any of this?

BOBBYSS : Okay. That is normal. You need to recheck the fuel pressure to see if the pump is defective. In the meantime I can tell you how to reset the security system. Turn the key on to the run position and leave it there for 10 minutes. Then leave the key in the ignition and turn the key off and back to run for ten more minutes. Then off and back on again. After the third time turn the key off and then slowly try to crank it.
Customer :

We can try that in the morning as we have put the tools away for the night. I will need to jump it again

Customer :

Does the security system cause the code reader to freeze? if the security is not reset?

BOBBYSS : Okay. Let me know what happens and we can continue from there.
Customer :

Security rest has solid light truck still won't start so I can't check for any codes. We did jump it.

Expert:  Michelle-Mod replied 2 years ago.


Hi, I’m a moderator for this topic and I wonder whether you’re still waiting for an answer. If you are, please let me know and I will do my best to find another Professional to assist you right away. If not, feel free to let me know and I will cancel this question for you. Thank you!


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