Subaru

Have Subaru questions? Ask a Subaru mechanic and get answers ASAP

Ask an Expert,
Get an Answer ASAP!

My 2001 Subaru forester STI (JDM) Is stuttering once I hit…

Customer Question
My 2001 Subaru forester...

My 2001 Subaru forester STI (JDM) Is stuttering once I hit boost @ 3000 rpm, it also makes a faint clicking noise as I hit 3000 rpm.

Mechanic's Assistant: Where exactly do you think the noise is coming from? And how long has this been going on?

It sounds like its from the engine bay. I purchased it a month ago and it's been doing it since before then. the previous owner told me it was a sparkplug issue but i replaced my plugs and leads and am still getting the issue. I have also replaced the MAF, Knock sensor, o2 sensor, replaced fuel and air filters, and check that my cat was okay

Mechanic's Assistant: Are you fixing your Forester yourself? What have you tried so far?

I am. i replaced my plugs and leads and am still getting the issue. I have also replaced the MAF, Knock sensor, o2 sensor, replaced fuel and air filters, and check that my cat was okay. I was going to order a coilpack but I'm getting nowhere with spending money and hoping my issue is fixed.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

I have a video of the sound i mentioned, here is the link http://tinypic.com/r/21culaa/9

Submitted: 10 months ago.Category: Subaru
Show More
Show Less
Ask Your Own Subaru Question
Answered in 18 minutes by:
9/30/2017
Subaru Mechanic: FIXITMAN, Master Technician replied 10 months ago
FIXITMAN
FIXITMAN, Master Technician
Category: Subaru
Satisfied Customers: 17,611
Experience: ASE MASTER CERTIFIED, AA DEGREE AUTO/DIESEL TECH
Verified
Hello my name is***** many miles are on the car?
Ask Your Own Subaru Question
Customer reply replied 10 months ago
There is 121000 kms on the car or 75186 miles
Subaru Mechanic: FIXITMAN, Master Technician replied 10 months ago
Thank you. Does the ticking noise change depending on if the engine is hot or cold?
Ask Your Own Subaru Question
Customer reply replied 10 months ago
No it seems to be consistent no matter how long the car has been running.
Subaru Mechanic: FIXITMAN, Master Technician replied 10 months ago
Okay. The ticking is either due to an ignition coil shorting and arcing or you may have a valve that is not opening correctly. The valve adjustment on the engine may be off.
Ask Your Own Subaru Question
Customer reply replied 10 months ago
Would a valve not be more consistent? It only happens at 3000 rpm, and i can feel the clicking in the gas pedal when it happens.Also, as far as ignition coil goes, is there a way to test my coil pack without swapping in a new one?
Subaru Mechanic: FIXITMAN, Master Technician replied 10 months ago
Ok the coils you would see white streaks usually if they were arcing. Most of the time a valve will do this if it is hanging up from carbon or the spring is weak.
Ask Your Own Subaru Question
Customer reply replied 10 months ago
I just checked the coils and don't see any signs of arcing, but I'm not exactly sure what to be looking for.Is there any way to test if it's the valves?
Subaru Mechanic: FIXITMAN, Master Technician replied 10 months ago

In order to check the valves you will need to pull the valve covers off to check for excessive play.

Ask Your Own Subaru Question
Customer reply replied 10 months ago
What about the coils? Can I test them with a test light?
Subaru Mechanic: FIXITMAN, Master Technician replied 10 months ago

You cant test them with a test light by you can with an ohm meter.

Ask Your Own Subaru Question
Customer reply replied 10 months ago
I'll get that tested asap and get back
Subaru Mechanic: FIXITMAN, Master Technician replied 10 months ago

Let me know what you find.

Ask Your Own Subaru Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a subaru mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask FIXITMAN Your Own Question
FIXITMAN
FIXITMAN
FIXITMAN, Master Technician
Category: Subaru
Satisfied Customers: 17,611
17,611 Satisfied Customers
Experience: ASE MASTER CERTIFIED, AA DEGREE AUTO/DIESEL TECH

FIXITMAN 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

1,349 satisfied customers

ASE Master Tech 15 + Years

Tim Mohr

Tim Mohr

ASE MASTER TECH

418 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

Matt

Matt

Engineer

373 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

332 satisfied customers

16 years of experience

Ron Z.

Ron Z.

- Subaru Tech -

260 satisfied customers

18+yrs experience. State Inspector and Subaru Diagnostics

Don - Mo Lurch

Don - Mo Lurch

Subaru Mechanic

193 satisfied customers

Heavy Line Mech, Race Shop Owner, Mobile Electronics.

< Previous | Next >

Related Subaru Questions
04 Subaru Outback Cali Spec that belongs to a friend. Car
04 Subaru Outback Cali Spec that belongs to a friend. Car was brought in because of a PO420. The owner had already replaced the Bank 1 CAT, all Exhaust gaskets on Bank 1, both Bank 1 O2 sensors, Fuel … read more
Matt
Matt
Engineer
Bachelor's Degree
373 satisfied customers
Cutting out at high rpm, wot. Stuttering from 4500+ rpm,
Cutting out at high rpm, wot. Stuttering from 4500+ rpm … read more
Dan
Dan
Dealership Technician
Associate Degree
2,143 satisfied customers
2004 Forester XS with manual transmission, has just over
2004 Forester XS with manual transmission, has just over 180k miles. I recently started getting some sputtering/roughness at idle. Oil and filter changed ~800 miles ago, full synthetic. Ran some seafo… read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
I have a 2010 Subaru forester with 80,000miles. It will cut
I have a 2010 Subaru forester with 80,000miles. It will cut out at random ,sometimes stall completely while driving down the road. after a few minutes it would start right back up like nothing was wro… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
5,862 satisfied customers
2000 Forester 115k miles Just replaced knock sensor and
2000 Forester 115k miles Just replaced knock sensor and still get hesitation. Cleaned PCV valve. Had been getting the P0420 since 85k....but all local mechanics want to replace catalytic converter ins… read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
Subaru Forester: , I bought a used 2011 Subaru Forester (touring
Hi, I bought a used 2011 Subaru Forester (touring package, no turbo) a few months ago. It has 105,000km on it (60,000 miles). I have determined that it is getting terrible mileage. The average 2011 Fo… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
I have a 1999 Subaru Forester with a 2.5L M/T. The block has
I have a 1999 Subaru Forester with a 2.5L M/T. The long block has recently been replaced due to a recent engine failure (low oil). After the shop got it back together the car runs strong up to 4000rpm… read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
Subaru Impreza WRX STi: Iv got a 2005 sti with an all original
Iv got a 2005 sti with an all original JDM swap in it got everything bolted up and put together, car takes about 5 to 10 seconds on cranking before it finally starts up, it runs but seems it needs a t… read more
Tim Mohr
Tim Mohr
ASE MASTER TECH
Master's Degree
418 satisfied customers
Daughter's 2010 Forester having issue with intermittent engine
Daughter's 2010 Forester having issue with intermittent engine stutter then shut off. Engine code of 420 (catalytic converter) does this make sense? Also cruise control and anti-sway warning lights on… read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
Subaru Impreza: I have a 2010 subaru impreZa non turbo. The
I have a 2010 subaru impreZa non turbo. The issue is when coming to a stop the engine dies. Going up grades or driving the highway it stutters as well. When the codes is cleared run fine till you stop… read more
FIXITMAN
FIXITMAN
Master Technician
Associate Degree
17,611 satisfied customers
Subaru: hello i have a 99 subaru forester, awd, 4 cyl 2.5 liter
hello i have a 99 subaru forester, awd, 4 cyl 2.5 liter automatic. on idle it up and down between 700 rpm to 1000 rpm. there are 2 codes. po102 and po420. thanks… read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
Subaru Forester L: Hi. 2000 Forester L model, 2.5 liter, 126,000
Hi. 2000 Forester L model, 2.5 liter, 126,000 miles. Got it used, drove it for 10k miles flawlessly. SUDDENLY, it starts to surge, lurch and sputter - running very rough and almost stalling. IT RUNS F… read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
My vehicle intermittantly runs rough as if it is not getting
My vehicle intermittantly runs rough as if it is not getting fuel. The fuel filter was replaced. Plugs are new. No check engine light.… read more
JacobTD
JacobTD
Diagnose Specialist
Master
46 satisfied customers
2000 subaru forester: idle..dies..It will stay running at higher rpms
I just bought a 2000 subaru forester. It runs but will only idle for about 5 seconds or so then it dies. It will stay running at higher rpms though. It gets hot very quickly as if it is running lean. … read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
2002 forester: the check engine light came on so..converter..000 miles
I have a 2002 forester and the check engine light came on so I downloaded the code with a Actron OBII the code that came up was P0420 Catalyst efficience bellow threshold bank1 I am not sure what this… read more
Randall
Randall
Auto Technician / Consultant
Vocational, Technical or Trade Scho
69 satisfied customers
99 impreza: hey..2.2L automatic with 120000kms..check engine light
hey there, i have a 99 impreza 2.2L automatic with 120'000kms, it bogs down at a slow drawl even with full throttle until you hit 2500rpm then comes alive as per normal. this happens in every gear. in… read more
Archer
Archer
High School or GED
31 satisfied customers
2002 forester: has started to die out periodicaly changed fuel filter
My 2002 forester has started to die out periodicaly changed fuel filter still the same. Dennis… read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
2002 Subaru Forester: very rough..stalling..coil..everything checked
2002 Subaru Forester with 137K on it. I have a very rough, sometimes stalling idle. Checked the wires, plugs, coil and everything checked out. Recently replaced the fuel filter, knock sensor, O2 senso… read more
baddad1
baddad1
technician
High School or GED
5 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