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 Pete Your Own Question

Pete, Pontiac Technician
Category: Pontiac
Satisfied Customers: 18768
Experience:  17 Years Pontiac Technician and training.
Type Your Pontiac Question Here...
Pete is online now
A new question is answered every 9 seconds

Pontiac G8: My 2009 Pontiac G8 GXP is dying at random time

Resolved Question:

My 2009 Pontiac G8 GXP is dying at random time while driving. No warning, no spitting or sputtering. It is as if someone just turned the switch off. It happens when slowing down or coasting. I have had the fuel system cleaned at a dealership but it is still dying. Please help. 6.2L LS3 V8 if that helps.
Submitted: 2 years ago.
Category: Pontiac
Expert:  Pete replied 2 years ago.

Hi my name is XXXXX XXXXX I will be glad to try and assist you with this.I may need more info in some cases to help with answering your question.

Has there been any point in time that it may not restart right away to where it has to sit before it restarts?

Let me know,thanks Pete.

Customer: replied 2 years ago.

No. It has died a total of 15-16 times over the past two weeks and it has restarted immediately each time. Engine has run strong entire time as well.

Expert:  Pete replied 2 years ago.
One common component to fail and cause this here is the crank position sensor.This sensor is located behind the starter.The starter has to be removed in order to access and replace this sensor.

This sensor can heat up with the engine temperature and when it weakens it can lose its signal,when it loses its signal it can cause this stall out here.In some cases the vehicle may start right back up and in others the vehicle may have to sit a period of time before it will restart.This usually wont cause a fault code to set making it difficult to diagnose and most likely this is why the dealer didn't see this as a fault.The only way to test to see if this is failing is when the vehicle is acting up and not starting,in this case the vehicle starts right up making it difficult to diagnose.

From what you have described here this sounds like the component at fault needing replaced.This sensor can cost around $50 and 1.2 hours labor to have replaced.


Thanks Pete

is my profile if you need anything in the future on your vehicle here,you can save it to your favorites and come back if you have any future questions on your vehicle (besides this question here).
Customer: replied 2 years ago.

Are there any other possible culprits that could cause this symptom without throwing a code? I ask because a couple of times this happened before the engine really got up to temp completely. Maybe 3-4 minutes after I started it up. Could an Ignition switch or ignition sensor do this? Mass Air Flow sensor? Just want to make sure I cover all bases in case the crank sensor does not fix it. Thanks!

Expert:  Pete replied 2 years ago.
The electronic ignition switch is another common component that can cause the vehicle to shut down like this here as well.The crank sensor is most common and in some cases doesn't require warm or extreme engine temperatures to cause it to stall out,it may occur on a cold start or shortly after starting the engine.

The ignition switch can be the culprit as well but on a newer vehicle you may see ignition fault codes set if this switch itself is starting to fail.The mass air flow would usually set a code as well.

Thanks Pete
Pete, Pontiac Technician
Category: Pontiac
Satisfied Customers: 18768
Experience: 17 Years Pontiac Technician and training.
Pete and other Pontiac Specialists are ready to help you
Expert:  Pete replied 2 years ago.

I am following up with you to see if you still needed help with your question you had asked.If my help didn't satisfy your question please let me know so we can continue.

Thanks Pete

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... seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like
...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:

  • 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
< Previous | Next >
  • 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
  • He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here. Diane Dallas, TX

Meet The Experts:

  • Dave Nova

    Pontiac Technician

    Satisfied Customers:

    ASE Master Certification. GM World Class Certification
< Last | Next >
  • Dave Nova's Avatar

    Dave Nova

    Pontiac Technician

    Satisfied Customers:

    ASE Master Certification. GM World Class Certification
  • Pete's Avatar


    Pontiac Technician

    Satisfied Customers:

    15 Years Pontiac Technician and training.
  • Gary's Avatar


    Pontiac Technician

    Satisfied Customers:

    15 years GM master tech/15 years ASE master
  • Ron Z.'s Avatar

    Ron Z.

    - Pontiac Tech -

    Satisfied Customers:

    18+yrs experience. State Inspector and Pontiac Diagnostics
  • John's Avatar



    Satisfied Customers:

    ASE A1-A8 w/L1 GM master technician.Factory certified/40 years experience
  • Don 'Mo Lurch''s Avatar

    Don 'Mo Lurch'

    Pontiac Mechanic

    Satisfied Customers:

    GM, Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.
  • car tech's Avatar

    car tech

    ASE Certified Technician

    Satisfied Customers:

    25 years master tech and shop owner