Subaru

Have Subaru Questions? Ask a Subaru Mechanic and Get Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Subaru

2002 Subaru Outback, 4 cyl. 281,000 miles. New spark plugs,

Customer Question
(this happened before changing plugs)...
2002 Subaru Outback, 4 cyl. 281,000 miles. New spark plugs, (this happened before changing plugs), new air filter, fairly new gas filter. On occasion, after I have driven the car for a while and it is at normal temperature, and then I stop and park the car for a short duration, like 10-15 minutes, the car will crank but not start. If I let it set for 10-20 minutes it will start right up.
Submitted: 1 year ago.Category: Subaru
Show More
Show Less
Ask Your Own Subaru Question
Answered in 1 hour by:
8/14/2016
Subaru Mechanic: Matt, Engineer replied 1 year ago
Matt
Matt, Engineer
Category: Subaru
Satisfied Customers: 22,258
Experience: Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing
Verified

Hello

This could be a wiring issue as things tend to expand when hot and its possible a poor or partial electrical connection is being pushed apart on one of the major sensors so check the connection plug and wiring to the following;

Airflow meter

Crank position sensor

Cam position sensor

O2 sensor

Throttle position sensor

unplug each in turn and use some switch / contact cleaner spray on the pins to ensure its all grease / dirt free

Also worth checking the connections to the fuel pump for the same reason - unplug each in turn and give them a good squirt of switch / contact cleaner - Not WD40

and also unplug and inspect the main power relays and fuses for signs of overheating or corroded terminals - so the ones for the ECU and the fuel pump

And also unplug the wiring loom connections in the engine bay one at time and inspect for corroded or recessed pins.

Ask Your Own Subaru Question
Subaru Mechanic: Matt, Engineer replied 1 year ago

Hi

do you still need help?

Bear in mind that the site takes a deposit from you at the beginning and this is held by the site until you rate my answer at which point the cash is split between the site and the expert. I am only paid for my work on this question if you rate my answer, using the star system at the top of the screen. Please do not forget! Thank you

Ask Your Own Subaru Question
Customer reply replied 1 year ago
I'm having a tough time rating you. Your answer was probably technically correct, but I really had no way to apply what you suggested. First I couldn't figure out which connections were the ones you were referring to, even having looked up a wiring schematic. The connections I could reach all seemed well seated, but most I was unwilling to risk detaching because they were near impossible to get my hands on, in particular the gas pump coupling, unless I could put the car on a stand or removed parts of the car to reach it. So, I really had no way to confirm the efficacy of your suggestions.In addition, the whole way this getting an answer system is screwy. I was charged $5 at the start, when I was supposed to pay only when I was satisfied - and I am ambivalent about that. I couldn't see your answer until I paid, and when I tried to pay it kept giving me an error message and that the payment could not go through. But my card is showing payment, though you are now saying yo do't get paid unless I rate you. And there seems to be no method of redress.Listen, I appreciate that this is income for you and you are probably good at it. But the mechanics of this system completely turned me off and will result in my never using it again.
Subaru Mechanic: Matt, Engineer replied 1 year ago

Sorry to hear that the system didn't work out for you

probably best to request a refund

http://ww2.justanswer.com/help/how-can-i-request-refund-0

Ask Your Own Subaru Question
Ask Matt Your Own Question
Matt
Matt
Matt, Engineer
Category: Subaru
Satisfied Customers: 22,258
22,258 Satisfied Customers
Experience: Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing

Matt is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

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 PElm 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.

PhilMarysville, 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.

CharlesWalnut 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!

SueCharleston, 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.

JimCastleberry, 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

< Previous | Next >

Meet the Experts:

Kevin C.

Kevin C.

Subaru Master Tech.

1,727 satisfied customers

34 years of Subaru service experience, ASE Master Technician.

George H.

George H.

Subaru Certified Technician

1,327 satisfied customers

ASE Master Tech 15 + Years

Tim Mohr

Tim Mohr

ASE MASTER TECH

409 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

Matt

Matt

Engineer

22,258 satisfied customers

Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing

Chris(aka-Moose)

Chris(aka-Moose)

Subaru Technician

285 satisfied customers

16 years of experience

Ron Z.

Ron Z.

- Subaru Tech -

237 satisfied customers

18+yrs experience. State Inspector and Subaru Diagnostics

Don - Mo Lurch

Don - Mo Lurch

Subaru Mechanic

189 satisfied customers

Heavy Line Mech, Race Shop Owner, Mobile Electronics.

< Previous | Next >

Related Subaru Questions
I have a 2014 Subaru outback. one of the four spark plugs is
I have a 2014 Subaru outback. one of the four spark plugs is not grab-able with a spark plug socket. It does not appear that the socket is seating on the plug as you do not get that click feel when in… read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
Have a Subaru Liberty 2003 2 litre have replaced fuel pump
Hi have a Subaru Liberty 2003 2 litre have replaced fuel pump no worries but every no and then it won't start leave it for a bit retry and usually starts have checked fuse but is there a fuel pump rel… read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
I have problems with the spark in spark plugs there is no
I have problems with the spark in spark plugs there is no spark in my 2005 subaru 3.0 … read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
We've changed the fuel pump on a '93 subaru impreza and
we've changed the fuel pump on a '93 subaru impreza and still not getting fuel. Any suggestions?… read more
Euro Specialist
Euro Specialist
Owner/Technician
Vocational, Technical or Trade Scho
504 satisfied customers
Gary I am wondering which spark plugs would be best for my
Hello Gary I am wondering which spark plugs would be best for my wrx. Just bought the car and havent had it on dyno. Have a bigger turbo aith pink sti injectors, I'm guessing right around 300 hp. Not … read more
Gary
Gary
Senior Technician
Vocational, Technical or Trade School
52 satisfied customers
Had a misfire in cylinder 6 I have replaced all spark plugs
had a misfire in cylinder 6 I have replaced all spark plugs in all cylinders as well as the replaced the Ignition coil for cylinder 6. However it is still pulling a p0306 code on that cylinder. The ca… read more
tamaz22
tamaz22
60 satisfied customers
2007 Impreza cranks but no start (intermittently). Fuel pump
2007 Impreza cranks but no start (intermittently). Fuel pump not running when key turned (when it doesn't start). … read more
Chris(aka-Moose)
Chris(aka-Moose)
Subaru Technician
Vocational, Technical or Trade School
285 satisfied customers
I have a fuel pump replacement question, original. My tank
2003 Outback, the only thing I haven't done is pull the pump. I'm wondering either how do I decrease the fuel level or how important is it to. How much fuel will spill? … read more
Matt Haas
Matt Haas
Technical Diploma
15 satisfied customers
1991 Subaru Loyale wagon. The fuel pump is not getting
1991 Subaru Loyale wagon. The fuel pump is not getting electric to it. Engine is turning over, good spark. Flushed lines, new filter, etc. If we spray ether it will momentarily start but stop. I am re… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,135 satisfied customers
Fuel pump doesn't want to prime, or turn on, It's the
Well, I had bad fuel, so I drained the tank and replaced almost all the fuel system other than the lines and the pump. The car ran great a few days ago, and I started it yesterday and it began to misfire again. Checked all the grounds, and when I went to turn the car on, the pump didn't prime or even turn on. … read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
Fuel pump? about ayear ago it was replaced, nnection at the
nnection at the pump only has power going to two wires … read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
I am trying to find out where the fuel pump relay is on a
I am trying to find out where the fuel pump relay is on a 2002 subaru outback. The car cranks but will not start. Don't hear the fuel pump. … read more
tamaz22
tamaz22
60 satisfied customers
My boyfriend changed my spark plugs in my Subaru and now my
My boyfriend changed my spark plugs in my Subaru and now my car won't even start … read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
I replaced my fuel pump on a 2008 subaru impreza sedan. i
i replaced my fuel pump on a 2008 subaru impreza sedan. i have fuel to the injectors and checked to make sure i have spark but the car still wont start what am i missing… read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
I have just bought a 1998 and the spark plug lead on the
i have just bought a 1998 foster and the spark plug lead on the passengers keeps on jumping off you drive about 1klm on the dam thing is off ,i have swaped the leads and it did not work … read more
Chris(aka-Moose)
Chris(aka-Moose)
Subaru Technician
Vocational, Technical or Trade School
285 satisfied customers
Spark plug stuck in engine. 2000 model, manual 300,000 km,
Just looked at it. Friend says try soak it with WD40 … read more
Brandon
Brandon
93 satisfied customers
My 2010 WRX won't start. I don't here the fuel pump prime
My 2010 WRX won't start. I don't here the fuel pump prime when I turn the key. The fuel pump fuse is good. I don't know where to find the fuel puimp relay, can you help? … read more
BOBBYSS
BOBBYSS
TECHNICIAN/ADVISOR
Associate Degree
8,343 satisfied customers
Fuel pump, i have only had about a year. 200,000 miles.
i have only had about a year. 200,000 miles. rebuilt engine … read more
supermechanic
supermechanic
Service consultant
Vocational, Technical or Trade Scho
10 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x