Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Chevrolet Malibu LS: my 2001 Malibu 3.1 starts surging at about…

Customer Question
my 2001 Malibu 3.1 starts...
my 2001 Malibu 3.1 starts surging at about 55mph with a loud humming noise from passenger front side. when cruise control on at this speed the loses rpm and has to downshift a gear to compensate. just replaced egr valve, but no difference.
Submitted: 2 years ago.Category: Chevy
Show More
Show Less
Ask Your Own Chevy Question
Answered in 10 minutes by:
7/1/2015
Chevy Mechanic: Gary, Chevy Technician replied 2 years ago
Gary
Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 17,891
Experience: 15 years GM master tech
Verified
I am sorry for the long waitare there any codes set in the computer at all ?when its making this noise if you turn to the right and then left with the steering wheel will turning the wheel to the right or left make the noise better or worse or change the noise ?
Ask Your Own Chevy Question
Customer reply replied 2 years ago
yes, there were throttle position sensor, egr valve, and oxygen sensor. replaced tps and egr, but now code just reads egr sensor. also the loud humming or howling noise does not matter when turning left or right.
Chevy Mechanic: Gary, Chevy Technician replied 2 years ago
have the front hub / bearing been checked to be sure the RF hub / bearing is not causing this noise ?what is the code number it only sets now ?
Ask Your Own Chevy Question
Customer reply replied 2 years ago
currently, code reads egr even after I replaced it with a new one. home phone 1-***-***-****
Chevy Mechanic: Gary, Chevy Technician replied 2 years ago
what is the code number ?
Ask Your Own Chevy Question
Customer reply replied 2 years ago
sorry I don't have code number, just relaying what my mechanic told me.
Chevy Mechanic: Gary, Chevy Technician replied 2 years ago
ok if you remove the O2 sensor out of the top of the back exhaust manifold near the fire wall and take it for a quick ride will the power come back ?
Ask Your Own Chevy Question
Customer reply replied 2 years ago
I did remove-unplug 02 sensor, but still have same problem of losing rpm's . overall car runs better, butstill is acting up. both front wheel bearings are fine.
Chevy Mechanic: Gary, Chevy Technician replied 2 years ago
we have to know what code number or numbers are being set
Ask Your Own Chevy Question
Was this answer helpful?
Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15,529
15,529 Satisfied Customers
Experience: GM Grand Master Technician 2007. 14 years experience.

GM Tech (Cam) 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 was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money.

Todd LRochester NY

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

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

Chevy Technician

15,529 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

17,891 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,866 satisfied customers

Have owned a repair shop for 25 yrs.

Dave Nova

Dave Nova

Chevrolet Technician

7,092 satisfied customers

ASE Master Certification. GM World Class Certification

John

John

Master A.S.E Automotive technician

4,071 satisfied customers

A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician

Don - Mo Lurch

Don - Mo Lurch

Auto Mech / Electronics

2,918 satisfied customers

Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

Ron Z.

Ron Z.

- Chevy Tech -

2,734 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
2003 Chevy Tahoe: many oxygen sensors are..V8
How many oxygen sensors are there in a 2003 Chevy Tahoe V8 and where are they located?… read more
Chevy man
Chevy man
Mastertech
Vocational, Technical or Trade Scho
2,650 satisfied customers
A p140a code, p140a and yes, 2011 2500HD Duramax, nothing
a p140a code JA: Just to clarify, what's the exact code? And have you tried to reset it? Customer: p140a and yes JA: What is the model/year of your Chevy? Customer: 2011 2500HD Duramax JA: Are you fix… read more
Tim&#039;s Auto Repair
Tim's Auto Repair
mechanic
High School or GED
8,866 satisfied customers
How do i reoplace the fuel pump on a 1990 Chevy G20 350 van
How do i reoplace the fuel pump on a 1990 Chevy G20 350 van… read more
shawnrbaldwin
shawnrbaldwin
Owner/mechanic
5 satisfied customers
Service exhaust fluid system 2016 duramac. 79 k seemed
I'm suppose to take a trip tomorrow hauling 3 horses. Don't know if I should try to go… read more
timdieseltech
timdieseltech
diesel tech
Vocational, Technical or Trade School
57 satisfied customers
Exhaust service light is on and pickup will only go 55 miles
exhaust service light is on and pickup will only go 55 miles an hour … read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
15,529 satisfied customers
Swapped the battery in 2008 corvette, now the dual exhaust
swapped the battery in 2008 corvette, now the dual exhaust sounds like it is in competition mode … read more
Marvin the Mechanic
Marvin the Mechanic
87 satisfied customers
Trying to find out exactly what the dual mode exhaust on a
trying to find out exactly what the dual mode exhaust on a 2012 c6 ls3 base 2lt consists of? … read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
I have a indicator that is telling me to service my exhaust
I have a indicator that is telling me to service my exhaust fluid system and it's counting down to limit my speed, what can I do to stop this? … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
I am just starting to hear a slight exhaust leak on my 97
I am just starting to hear a slight exhaust leak on my 97 k2500 suburban and i am thinking about changing the entire system i want to run dual exhaust with flow masters and headers but still use my o2… read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
After changing the solenoid for the exhaust and manifold, My
after changing the solenoid for the exhaust and manifold, My '08 Chevy Malibu still has rough acceleration or rough idling … read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
362 satisfied customers
I'm getting a service exhaust fluid message. 130,000,
yes, ive tried the module on top of the exhaust fluid tank … read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
I get a bad odor like rich exhaust from the car. No exhaust
I get a bad odor like rich exhaust from the car. No exhaust leaks, no check engine light all engine data seems normal … read more
rpmdiag
rpmdiag
High school
7,589 satisfied customers
I have a 2009 2500HD and my Screen says Service Trailer Brake
I have a 2009 2500HD and my Screen says "Service Trailer Brake System" I have an aftermarket exhaust which removed the DPF filter. The Dealership can not fix the issue as they are saying the BCM codes… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
15,529 satisfied customers
diagnostic code P0404 on my silverado. Could be ...
diagnostic code P0404 on my silverado. Could be clogged or need to be replaced, how much will this cost me?… read more
supermechanic
supermechanic
Service consultant
Vocational, Technical or Trade Scho
10 satisfied customers
My 2007 Chevy Tahoe LTZ intermittently gives a Service Suspension
My 2007 Chevy Tahoe LTZ intermittently gives a "Service Suspension System" warning. If I start the vehicle 6 times during the day, I might get 3 warnings. Local Chevy dealer said it is giving code c06… read more
Hal
Hal
owner/service tech
Vocational, Technical or Trade Scho
848 satisfied customers
Where is bank 1 sensor 1 located on a cheverlot venture ls
where is bank 1 sensor 1 located on a cheverlot venture ls van 3.4… read more
Dave Nova
Dave Nova
Chevrolet Technician
Associate Degree
7,092 satisfied customers
How do I replace 1-2 shift solenoid on 2002 1500 v-8 4x4 suburban
How do I replace 1-2 shift solenoid on 2002 1500 v-8 4x4 suburban… read more
David H
David H
Vocational, Technical or Trade Scho
2,413 satisfied customers
Need intake manifold torque specs for a Pontiac Grand Prix
What is the torque specs and sequence for a 3800 v6 in a Pontiac Grand Prix?… read more
Eric
Eric
Retired
N/A
14,436 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