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 Joel Your Own Question

Joel
Joel, Auto Service Technician
Category: Car
Satisfied Customers: 1599
Experience:  18 years and growing GM, ASE certified. Specializing in Chevy, Buick, Olds, Pontiac.ASK!
5217488
Type Your Car Question Here...
Joel is online now
A new question is answered every 9 seconds

Isuzu Trooper: I have a 2001 Isuzu It has developed a weird

Resolved Question:

I have a 2001 Isuzu It has developed a weird whine. It seems to stop when I accelerate. but starts again when I let off the gas. It also seems to not want to always idle, acts like it might die. Not all the time though. This whine has gotten louder and I am worried something it about to break. I listened under the hood thinking it is a hose leaking, could seem to tell where it was coming from..??? Any ideas???
Submitted: 11 months ago.
Category: Car
Expert:  Joel replied 11 months ago.
Hello and welcome.
The noise you are describing and the fact that it has an erratic idle and wants to die, tells me you have a vacuum leak. Vacuum leaks can cause a whine or whistle noise and affects engine idle speed- not higher RPM's.

A vacuum leak can come from many places...
Throttle body gasket, any numbers of vacuum hoses, intake manifold gasket, etc. The best way to find a leak is to spray some brake cleaner or carb cleaner in those and all areas where there is vacuum.
NOTE: stay away from any source of ignition like plug wires and coil, also stay away from the exhaust- the spray cleaner is VERY flammable. When the spray gets into a vacuum leak, the idle will surge indicating the source of the vacuum leak.
Joel, Auto Service Technician
Category: Car
Satisfied Customers: 1599
Experience: 18 years and growing GM, ASE certified. Specializing in Chevy, Buick, Olds, Pontiac.ASK!
Joel and 21 other Car Specialists are ready to help you
Customer: replied 11 months ago.

thank you for getting back to me quickly... I appreicate your time and your answer seems likely. I am glad to think it is a leak and nothing to major. Just one more question... You say to spray carb or brake cleaner in areas with the vaccum? Am I to understand I just spray at the hose or manifold? I take it the car needs to be running and I want to stay away from ignition wires... I does not wish to sound too silly or ask a stupid question just never done this before and want to be sure...

Expert:  Joel replied 11 months ago.

Sorry, yes that is exactly correct. Not a silly question. Yes, with engine at idle, spay around looking for the leak.

Joel, Auto Service Technician
Category: Car
Satisfied Customers: 1599
Experience: 18 years and growing GM, ASE certified. Specializing in Chevy, Buick, Olds, Pontiac.ASK!
Joel and 21 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