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 Ivan Your Own Question

Ivan, ASE Certified Master Technician
Category: Car
Satisfied Customers: 4871
Experience:  ASE Master Tech w/ 20+ years in the field. Self employed for 9 years. Member of AUTOLAB radio show.
Type Your Car Question Here...
Ivan is online now
A new question is answered every 9 seconds

2001 Olds Aurora: V6 and whenever I..dies..start right

Resolved Question:

I Have a 2001 Olds Aurora 3.5l twin cam V6 and whenever I start the car about 50 to 60 percent of the time it dies out just after it turns over. Sometimes I have to start it three or four times other times it will start right up and runs perfectly (so I think) I just bought the car a week ago. I have replaced the fuel filter (which was totally brown gas when I emptied the old one out) Im running 91 Oct in it, it calls for 89. Not sure what the problem could be changed the air filter as well.
Submitted: 6 years ago.
Category: Car
Expert:  Ivan replied 6 years ago.

Hello Xpensiveobcesions, Look for a dirty throttle plate. Remove the snorkel that goes from the air filter box to the throttlebody. Manually open the throttle plate. Dirt builds up on the back side of the plate and around the bore where it sits in. When dirt builds up, it closes off the air gap that allows air to flow past. When this happens, idle becomes too low and stalling insues. Use carburetor or throttlebody cleaner and a brass brush to clean the dirt, then wipe things clean with a rag. See if that helps at all. Let me know.


Your JA Expert,


Customer: replied 6 years ago.

Hello Ivan,


I did so,I pulled the intake plenum the MAF and the throttlebody off to insure a good clean. While those were off I also cleaned what I could from the intake manifold just inside a little bit. Cleaned the intire air intake system with carb cleaner and even cleaned the little idle hole on the throttle plate. As of right now i'm still having issues with it, drove it around for about 20 miles and its still happening, if that was it my guess is that it would be an instant fix. So the problem still exists.

Expert:  Ivan replied 6 years ago.

I do agree, if that was it, it would have been better right off the bat, so now we have to get deeper. The next thing we need to verify is what is the fuel pressure when you start the car the first time. That car should have a test port on the fuel rail, so you will need a fuel pressure guage. Here is your spec.


Fuel System Pressure
Key On Engine Off 41-47 psi


Let's see where that leads us and we'll move forward from there.

One other thing, I haven't seen it on your car, but it's worth checking none the less. Locate your fuel pressure regulator on the fuel rail. Disconnect the vacuum line from it and see if there is fuel present in the vacuum line. If there is, that's the problem and excess fuel is entering the engine. You may have to check several times and look with the car running and just after shutting it off.

Customer: replied 6 years ago.

Hey Ivan,


Ok so I tested the fuel pressure and it tested between 45 and 46 psi. Also I checked a couple vacuum lines from the rail to the throttlebody (only ones I could find) and both on both sides of the tube were dry/no fuel present. What would be next?

Expert:  Ivan replied 6 years ago.

Ok, the next thing is a little harder to test since you don't have a scan tool. On the throttlebody, you have an Idle Air Control motor. It is located as #5 in this diagram.



I am attaching a description of what this device does. It has a tapered pintle that closes of an air passage then opens up the cap to regulate a specific idle speed. If that pintle is getting stuck into the seat or the motor is getting stuck not allowing it to retract, it could be causing your issue. Again with out a scan tool, it's impossible to operate. You can remove the 2 bolts and remove it. The pintle and seat get dirty like the throttlebody, so clean them and let's see what happens. Do not push the IAC in, or you'll have to drive it to allow it to move back into it's proper position.


The Idle Air Control (IAC) valve is located in the throttle body of both the Throttle Bowl Injection (TBI) and the multi-port fuel injection (MFI) Systems. The IAC valve consists of a movable pintle, driven by a gear attached to an electric motor called a stepper motor. The IAC valve motor is a 2-phase bi-polar permanent magnet stepper motor that is capable of highly accurate rotation, or movement, every time the polarity of a winding is changed. This change in polarity can be seen when observing a test lamp connected between ground or B+ and an IAC valve circuit while the PCM is attempting to change engine RPM. The test lamp will flash ON or OFF each time the polarity is changed. The Powertrain Control Module (PCM) does not use a physical sensor in order to determine the IAC pintle position, but uses a predicted number of counts. One count represents one change in the polarity, which equals one step of the stepper motor. The PCM counts the steps it has commanded in order to determine the IAC pintle position. The PCM uses the IAC valve in order to control the engine idle speed. The PCM does this by changing the pintle position in the idle air passage of the throttle body. This procedure varies the air flow around the throttle plate when the throttle is closed. In order to determine the desired position of the IAC pintle at idle or during deceleration, the PCM refers to the following inputs:

  • The engine RPM
  • The battery voltage
  • The air temperature
  • The engine coolant temperature
  • The throttle position sensor angle
  • The engine load
  • The vehicle speed

When the ignition key is turned OFF after an ignition cycle, the PCM will first seat the IAC pintle in the air bypass bore and then retract the pintle a predetermined number of counts in order to allow the proper amount of air to bypass the throttle plate for engine start-up. This procedure is known as an IAC reset.

Expert:  Ivan replied 6 years ago.

Also here is a picture of the fuel pressure regulator. The vacuum line that attaches to this unit is the one you need to check. I think your engine has a plastic cover on it. You most likely have to remove that plastic cover to see this item.



Ivan, ASE Certified Master Technician
Category: Car
Satisfied Customers: 4871
Experience: ASE Master Tech w/ 20+ years in the field. Self employed for 9 years. Member of AUTOLAB radio show.
Ivan and 9 other Car 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... 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:

  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
< Previous | Next >
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles Walnut Creek, CA
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue Charleston, WV
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, do indeed know your stuff. Jim Castleberry, FL
  • Excellent reply, and also very quick. Really sounds like the Expert knows what he is talking about. I will be back to use your service when I need more help with my RV. Dutch USA

Meet The Experts:

  • Chris (aka-Moose)


    Satisfied Customers:

    16 years of experience
< Last | Next >
  • Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)


    Satisfied Customers:

    16 years of experience
  • Ted G.'s Avatar

    Ted G.

    ASE Certified Technician

    Satisfied Customers:

    20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
  • George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
  • GM Tech (Cam)'s Avatar

    GM Tech (Cam)

    Auto Service Tech

    Satisfied Customers:

    GM Grand Master Technician 2007. 14 years experience.
  • Amedee's Avatar


    ASE Master Tech

    Satisfied Customers:

    ASE Master Tech advanced level specialist. Wisconsin certified emissions state inspector
  • Jerry's Avatar


    Master Mechanic

    Satisfied Customers:

    ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
  • Richard's Avatar


    ASE Certified Technician

    Satisfied Customers:

    12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes