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 Jay Your Own Question

Jay
Jay, Chevy Mechanic
Category: Chevy
Satisfied Customers: 596
Experience:  Several yrs experience, GM Trained,
12620940
Type Your Chevy Question Here...
Jay is online now
A new question is answered every 9 seconds

2001 gmc sierra 1500: v8..check engine light..the truck starts acting

Resolved Question:

I have a 2001 gmc sierra 1500 4.8liter v8 the check engine light keeps coming on. When it does the truck starts acting up {cuting out) when i give it gas. I have to pull over and turn it off. then it will start fine until i give it alot of gas. auto zone checked out the check engine light and told me it was an oxygen sensor so i changed it. Then they rest the light about 1 day later it came on again they said it was geting low voltage to the sensor. I fixed it and the light still keeps coming on. I can reset the light and it runs fine but as soon as the light comes back on it runs like crap. can you tell me what is wrong and how to fix it. They didnt give me a code. Thank you
Submitted: 6 years ago.
Category: Chevy
Expert:  Jay replied 6 years ago.
HelloCustomer it would help a lot if you were able to get the code. Without it were doing a lot of guess work.
Customer: replied 6 years ago.
i got two codes from autozone today there are po171 and po174 the told me that i wasnt getting enough fuel that it could be a vacumm leak or a bad fuel pump could you tell me which one it could most likely be and how to fix it. thank you
Expert:  Jay replied 6 years ago.

HelloCustomer I'm thinking it is likely more likely to be the fuel pump since both sides of the engine are producing lean but I think it is still worthwhile to check for a vacuum leak. Here are some things to do:

  1. Operate the engine at idle.

Check for vacuum leaks at the intake manifold, throttle body, and injector O-rings.

  1. Check the air induction system and the air intake ducts for leaks.
  2. Check the AIR system for leaks, improper air delivery, and for the shut-off valves not closing.
  3. Check the crankcase ventilation system for leaks.

Basically if you notice your engine running a little bit of a high idle or rough idle it could be a vacuum leak and reply back to me if this is the problem. If you do not find anything in the vacuum area it likely needs a fuel pump, this requires removing the fuel tank underneath the car. This is quite a task without a hoist to lift the truck up and without a special jack to rest the tank on but if you would like the instructions on how to remove the tank, I can provide it to you.

Jay, Chevy Mechanic
Category: Chevy
Satisfied Customers: 596
Experience: Several yrs experience, GM Trained,
Jay and 4 other Chevy Specialists are ready to help 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
 
 
 
Chat Now With A Chevy Mechanic
Jay
Jay
Auto Mechanic
336 Satisfied Customers
Several yrs experience, GM Trained,