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 sprinkles08 Your Own Question

sprinkles08
sprinkles08, ASE Certified Technician
Category: Car
Satisfied Customers: 17440
Experience:  ASE Master and Advanced level certified. Factory trained with 14 years dealership experience
9825021
Type Your Car Question Here...
sprinkles08 is online now
A new question is answered every 9 seconds

Lexus IS 300: Greetings, a friends has a 2007 Lexus IS, and

Resolved Question:

Greetings, a friends has a 2007 Lexus IS, and once in a while she will go to press the start button and it will start until you let off the button and it dies. Sometimes you have to repeat pushing the button 4-5 times before it will stay started. It does not do this all the time. My thoughts are camshaft sensore or knock sensor (same sensor?) or bad start button/switch. Please advise. :)
Submitted: 1 year ago.
Category: Car
Expert:  sprinkles08 replied 1 year ago.

Hello and welcome to JustAnswer!

 

I see that your question has been up for an extended time without a response and while although this vehicle isn't in my area of greatest expertise I would like to try to help.

 

There are quite a few things she could have going on. The first thing I would recommend is checking for fault codes. If there is a sensor issue there is a good chance a code will be set that will aid in diagnosis. If no one has a code reader or scan tool available you can have the codes read for free at most large parts stores like Autozone.

 

The problem could be related to the throttle body, mass airflow sensor, leaking fuel injectors or a leaking fuel pump check valve, the fuel pump resistor, etc. A bad cam or crank sensor would usually cause either a no start situation or it would eventually start with a long crank time, it's possible that it could have a bad cam or crank sensor but not as likely. A knock sensor really couldn't cause a problem like she is having.

 

Try cracking the throttle open and see if it helps starting. If it does help then the throttle body or fuel issues are more likely.

Customer: replied 1 year ago.


Thank you for your time and detailed reply! I do have a question for you regarding a fuel related concern. When this issue arises, holding the start button down will keep the car running. If it was fuel related, I'm not sure I see how holding the button down would keep it running? Thats why I leaned toward electical/sensor related. While the start button is continuously held during these situations, it runs 100% normal, without orugh idle or rpm loss.


 


Another question...can you have fault codes with receiving a warning light?


 


Thank you for looking into this and offering your help. Lexus gives her the obvious (and understandable) answer of "you have to bring it in when it's experiencing the issue or we cant help." Of course, in this scenario, if she's experiencing the issue the car wont start and she cant bring it in! lol

Expert:  sprinkles08 replied 1 year ago.
Yes, you can definitely have fault codes set with no warning light. In a case like this checking for fault codes is definitely the first thing you would want to do.
sprinkles08, ASE Certified Technician
Category: Car
Satisfied Customers: 17440
Experience: ASE Master and Advanced level certified. Factory trained with 14 years dealership experience
sprinkles08 and 10 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... 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 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
< Last | 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, Frank...you 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)

    Technician

    Satisfied Customers:

    846
    16 years of experience
< Last | Next >
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
  • http://ww2.justanswer.com/uploads/TE/TedG/2012-6-15_14759_avaLarge.64x64.jpg Ted G.'s Avatar

    Ted G.

    ASE Certified Technician

    Satisfied Customers:

    1596
    20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
  • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    1311
    ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    ASE Master Tech

    Satisfied Customers:

    2367
    ASE Master Tech advanced level specialist
  • http://ww2.justanswer.com/uploads/SU/supermechanic/2013-8-23_03546_500.64x64.jpg Jerry's Avatar

    Jerry

    Master Mechanic

    Satisfied Customers:

    1906
    ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    942
    12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes
  • http://ww2.justanswer.com/uploads/ST/Steve7654/2012-6-5_215929_japic800x660.64x64.jpg Steve's Avatar

    Steve

    Auto Service Technician

    Satisfied Customers:

    1980
    25+ yrs experience as a professional working technician; ASE L1 master technician
 
 
 
Chat Now With An Auto Mechanic
sprinkles08
sprinkles08
2302 Satisfied Customers
ASE Master and Advanced level certified. Factory trained with 14 years dealership experience