Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

My name is ***** *****. I have a 1999 Chevy Venture that…

Customer Question
Hi-my name is *****...

Hi-my name is ***** *****. I have a 1999 Chevy Venture that stumbles and has loss of power shortly after you start accelerating. Started in early December. Does ok at highway speed unless you have to step on it to pass someone, then it stumbles also. I took it to a mechanic a couple weeks ago and he couldn't find anything wrong. He thought maybe the MAF sensor but didn't want to make me spend $300 on it. So I bought one from NAPA and tried it and it didn't help so I returned it. The spark plugs and wires are 6 months old, the EGR valve was replaced last summer, aolng with both O2 sensors and the fuel filter. The mechanic said the fuel system seems fine, but I wonder if it's the fuel pressure regulator. Any ideas on what to try?

Mechanic's Assistant: Thanks. Can you give me any more details about your issue?

That's pretty much everything I can think of. I put a few bottles of fuel injector cleaner through it on a big trip we took it on for Christmas. Didn't make any difference.

Submitted: 2 years ago.Category: Chevy
Show More
Show Less
Ask Your Own Chevy Question
Answered in 1 hour by:
1/30/2016
Chevy Mechanic: BOBBYSS, Master Technician replied 2 years ago
BOBBYSS
BOBBYSS, Master Technician
Category: Chevy
Satisfied Customers: 17,580
Experience: ASE MASTER CERTIFIED, AA DEGREE AUTO/DIESEL TECH
Verified

Hello, my name is***** you for the question. Can you tell me if the check engine light comes on when this occurs? Does it change at all depending on if the engine is hot or cold?

Ask Your Own Chevy Question
Customer reply replied 2 years ago
Hi,
Sorry I forgot to mention that-no check engine light. It does it both when the engine is cold and when warmed up. If you are doing a normal acceleration like from a stop light or sign, it initially starts normally, then before it does it's first gear shift it just bogs down and has a loss of power until you get to a steady speed. Also if you are cruising at a given speed and need to put a little more accelerator pedal down to go up a hill or get around someone, it bogs down. Pretty severe loss of power. If you floor it it will eventually kick down to a lower gear and get some power back when the revs go up.
Chevy Mechanic: BOBBYSS, Master Technician replied 2 years ago

It sounds like the fuel pressure may dropping off as you drive. It may also be a failing catalytic converter. Both of these are common and will cause this without turning on a check engine light.

Ask Your Own Chevy Question
Customer reply replied 2 years ago
Thanks-so what do you think the next step should be? Fuel pressure regulator?
Chevy Mechanic: BOBBYSS, Master Technician replied 2 years ago

I would drive it with a fuel pressure gauge installed to see if the pressure bleeds off. Or replace the regulator first.

Ask Your Own Chevy Question
Was this answer helpful?
Ask BOBBYSS Your Own Question
BOBBYSS
BOBBYSS
BOBBYSS, Master Technician
Category: Chevy
Satisfied Customers: 17,580
17,580 Satisfied Customers
Experience: ASE MASTER CERTIFIED, AA DEGREE AUTO/DIESEL TECH

BOBBYSS 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

15,289 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,357 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
Car surges rpms go up and down when going down the road
car surges rpms go up and down when going down the road… read more
Steve7654
Steve7654
Service Manager/ Technician
4 satisfied customers
2003 chevrolet trailblazer: runing rough..check engine light to blink
2003 chevrolet trailblazer suddenly starts runing rough with substancial power loss causing check engine light to blink… read more
MasterTech509
MasterTech509
268 satisfied customers
I have a 2004 Chevy Classic. The check engine light is
I have a 2004 Chevy Classic. The check engine light is flashing and the car idles rough. I parked the car till it is fixed. I changed the spark plugs and air filter but this has not helped. I am takin… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
5,258 satisfied customers
Not sure of spark plug cable order. 2003 Suburban. All spark
Yes..all spark plugs are in...but i notice different #s on all cables … read more
Ron Z.
Ron Z.
- Chevy Tech -
Vocational, Technical or Trade Scho
2,734 satisfied customers
The insulator is broke on my spark plug again only after
The insulator is broke on my spark plug again only after 15,000 miles and I'm getting a misfire on that cylinder number seven. It's a 2007 Chevy suburban 5.3 with 186,000 miles. What are the possible … read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,357 satisfied customers
I just changed my spark plugs and both of my oxygen sensors.
I just changed my spark plugs and both of my oxygen sensors. What does it mean to have lean deposits on the spark plugs and upstream oxygen sensor and rich deposits on the downstream oxygen sensor? … read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,357 satisfied customers
Need new catalytic converter. Looked under truck to find the
Need new catalytic converter. Looked under truck to find the muffler is before the cat and the connecting flange is cut off by Midas a few years ago. Can I mount the cat behind the muffler, and how to… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
5,258 satisfied customers
My 89 camaro lost spark after I changed the spark plugs and
My 89 camaro lost spark after I changed the spark plugs and distributor cap what could be the problem?… read more
Danny
Danny
Owner, lead mechanic
High School or GED
3,963 satisfied customers
Rotten egg smell, was told its the catalytic converter but
rotten egg smell, was told its the catalytic converter but not sure.. while doing a steady 30mph+ truck seems to skip and sounds like its dogging out … read more
Pete
Pete
Mechanic
Construction, Plant Fitter
136 satisfied customers
My catalytic converter went on my 2008 Impala I think
My catalytic converter went on my 2008 Impala I think because I had a wiring problem that made the fuse blow that controlled the circuit for the O2 sensors. Also I had a AIR valve that was stuck in th… read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
My catalytic converter failed a couple of years ago. I think
My catalytic converter failed a couple of years ago. I think it was a combination of a stuck AIR valve and a wiring problem that kept causing the fuse that controls both O2 sensors and the EVAP soleno… read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
Pete again, lack of power like a catalytic converter is
Hey Pete again, lack of power like a catalytic converter is stopped up or air filter stopped up, no codes, checked back pressure on pre-cat 02 sensors and after cats, doesnt appear to have stopped up … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
2003 chevy impala: runs rough..sputters..accelerating..it hits 43 mph
2003 chevy impala runs rough -- sputters at medium speed when accelerating and when it hits 43 mph runs smooth. When in park and I rev engine it runs fine and when I hit 4000RPM sputters very bad… read more
Dave Nova
Dave Nova
Chevrolet Technician
Associate Degree
7,092 satisfied customers
Cavalier: its runs really rough and the Check Engine Light flashes
When I start my Cavalier its runs really rough and the Check Engine Light flashes. Then after a minute it starts to run normally and the light stops flashing but stays on.… read more
Michael Moore
Michael Moore
Team leader, bumper to bumper tech.
Associate Degree
1,323 satisfied customers
95 blazer 4.3 check engine light is on and blinking
95 blazer 4.3 check engine light is on and blinking… read more
DriverDave
DriverDave
Smog Technician
40 college units completed with 4.0
66 satisfied customers
My car wont go over 25 mph
my car wont go over 25 mph… read more
HondaPlatinum
HondaPlatinum
High School or GED
148 satisfied customers
I keep getting a P0300 pd error code that keeps making the
I keep getting a P0300 pd error code that keeps making the engine light come back on. I barely make ends meet every month. i am trying to get this fixed so i can pass my emissions test. It passed all … read more
im-not-guilty
im-not-guilty
technician
Vocational, Technical or Trade Scho
54 satisfied customers
I have a 2001 chevy blazer 4.3 vortec. Trouble starting, slow
I have a 2001 chevy blazer 4.3 vortec. Trouble starting, slow starting would start after 2 attempts. Thought thats they way it is. My Honda starts first time right away. Thought Chevy different. Blaze… read more
Dodge expert
Dodge expert
ASE MASTER TECH, REPAIR FACILITY OWNER
High School or GED
3,636 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