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 Mike V. Your Own Question

Mike V.
Mike V., Subaru Technician
Category: Subaru
Satisfied Customers: 20365
Experience:  Certified Subaru Technician, factory trained by Subaru.
2921078
Type Your Subaru Question Here...
Mike V. is online now
A new question is answered every 9 seconds

2002 Subaru Outback: it hesitates..occurs only on the drive home

Resolved Question:

I have a 2002 Subaru Outback. The issue is that it hesitates after I fill it up with gas. This occurs only on the drive home after filling it up. After it sits for the night it's fine the next day. This issue occurs throughout the year -- in colder weather and warm.
Submitted: 2 years ago.
Category: Subaru
Expert:  Mike V. replied 2 years ago.
Greetings Sir or Madam and welcome to JA! I will do my very best to assist you with your problem.
Hi there!
Is the check engine light on or come on when the issue is occurring?
Do you have any trouble starting the car after filling it up?
Customer: replied 2 years ago.
Hi,

The check engine has been on once in the past year and did not produce a code when I took it to Autozone. I tightened the gas cap and the light hasn't come on since. The hesitation in acceleration has occurred consistently after each gas fill up for about a year. The engine light code may be related, but I'm not sure and it is very infrequent relative to the hesitation (again, only once in the past year).

The car never has an issue starting whether it's after filling gas or not.

Thanks,

David
Expert:  Mike V. replied 2 years ago.
Ok, the only issue I can think of that may be related is some type of issue with the purge control valve. If it is sticking open a bit, when you fill the car it might be allowing to many fuel vapors into the mixture. This could give the car to much fuel and sort of flood it. This could cause rough running, a hesitation from starts. Things of this nature.
The other thing I do see that causes this type of thing is a faulty front O2 sensor. Normally however it wouldn't just be related to adding fuel to the car. This is more consistent in most cases.
The purge control solenoid allows intake vacuum into the evap system to suck the fuel vapors out of the canister under the car. I really see no other connection between fueling the car and the hesitation.
Mike V., Subaru Technician
Category: Subaru
Satisfied Customers: 20365
Experience: Certified Subaru Technician, factory trained by Subaru.
Mike V. and 4 other Subaru 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
  • 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
 
 
 

Meet The Experts:

 
 
 
  • Kevin C.

    Subaru Master Tech.

    Satisfied Customers:

    1720
    34 years of Subaru service experience, ASE Master Technician.
< Last | Next >
  • http://ww2.justanswer.com/uploads/SU/Subaruwiz/2012-5-24_23311_Picture1.64x64.jpg Kevin C.'s Avatar

    Kevin C.

    Subaru Master Tech.

    Satisfied Customers:

    1720
    34 years of Subaru service experience, ASE Master Technician.
  • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

    George H.

    Subaru Certified Technician

    Satisfied Customers:

    959
    ASE Master Tech 15 + Years
  • http://ww2.justanswer.com/uploads/TA/tamaz22/2012-9-29_142316_IMG0722.64x64.JPG tamaz22's Avatar

    tamaz22

    ASE Certified

    Satisfied Customers:

    363
    Subaru certified,ase certified,20years experience
  • http://ww2.justanswer.com/uploads/tsmodie/2009-6-10_144056_tim.jpg Tim Mohr's Avatar

    Tim Mohr

    ASE MASTER TECH

    Satisfied Customers:

    333
    30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
  • http://ww2.justanswer.com/uploads/35/350matt/2012-6-7_182356_matsavatr.64x64.jpg Matt's Avatar

    Matt

    Engineer

    Satisfied Customers:

    212
    Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing
  • http://ww2.justanswer.com/uploads/JA/JACUSTOMERcvb4xdcm/2011-2-8_22633_toddstechline2.64x64.jpg Canuck Tech's Avatar

    Canuck Tech

    Automotive Service Technician

    Satisfied Customers:

    170
    Trainer
  • http://ww2.justanswer.com/uploads/2P/2paulm/2012-4-4_183431_justabswer.64x64.jpg Paul M ASE Master's Avatar

    Paul M ASE Master

    ASE Master Tech

    Satisfied Customers:

    161
    ASE Master Tech 20+ Years