GM

GM repair problems? Ask a GM repair expert now.

Ask an Expert,
Get an Answer ASAP!

1998 gmc: sluggish..map,o2,cam, an others

Customer Question
i have a 1998 gmc...
i have a 1998 gmc z71. runs sluggish, checked codes, has 10 codes. map,o2,cam, an others. now i noticed that when applyn the brake the speedometer goes to 100. i checked for mouse nest an broken wires an didnt see any broke or chewed.
Submitted: 8 years ago.Category: GM
Show More
Show Less
Ask Your Own GM Question
Answered in 11 minutes by:
6/23/2010
GM Mechanic: Amedee, GMC Technician replied 8 years ago
Amedee
Amedee, GMC Technician
Category: GM
Satisfied Customers: 28,309
Experience: ASE certified tech with advanced level specialist. Wisconsin certified emissions state inspector
Verified
Hello!

Lets check one thing at a time. We can go after the codes or after the low power issue... what ever you prefer. WHat kind of testing equipment do you have? DO you have a scanner that can read live data?
Ask Your Own GM Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a gm mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam)
GM Tech (Cam), GMC Mechanic
Category: GM
Satisfied Customers: 5,845
5,845 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)

GMC Mechanic

5,845 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

GMC Technician

1,561 satisfied customers

15 years gm master tech/15 years ASE master tech

car tech

car tech

ASE Certified Technician

449 satisfied customers

25 year master tech and shop owner

Chris (aka- Moose)

Chris (aka- Moose)

GMC Technician

234 satisfied customers

16 years of experience

Paul M ASE Master

Paul M ASE Master

ASE Master Tech

187 satisfied customers

ASE Master Tech 20+ Years

Anthony

Anthony

GMC Technician

489 satisfied customers

GM Certified

Amedee

Amedee

GMC Technician

28,309 satisfied customers

ASE certified tech with advanced level specialist. Wisconsin certified emissions state inspector

< Previous | Next >

Related GM Questions
Same truck as the last question on electrical issues. Turns
Same truck as the last question on electrical issues. Turns out a rat had chewed the wires under the fuse box - exactly what you had said - I had them read your post and suggested they call you first.… read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
362 satisfied customers
GM suburban K500: 1996 gmc suburban Cutting out under load. Completed
1996 gmc suburban Cutting out under load. Completed tune up, including: ignition module, coil, rotor, cap, wires, plugs, MAF, O2 sensors, fuel filter. No change. Checked fuel pressure: 46psi Replaced … read more
Kavey
Kavey
86 satisfied customers
I have a 1993 GMC Sierra Z71.It started having a random miss
I have a 1993 GMC Sierra Z71.It started having a random miss fire . Some times real bad others almost un noticeable.But others it runs like a champ.Number 8 Cylinder and 3 plugs are black on one side … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
1998 GMC: bypass..catalytic converters..your check engine light coming
can you bypass your catalytic converters on a 1998 GMC Sierra with out your check engine light coming on… read more
GM Tech (Cam)
GM Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
5,845 satisfied customers
2007 gmc: 4x4..check engine light..truck drives and runs fine i
i have a 2007 gmc 1500 z71 4x4 new body style with a 5.3 liter with 68 thou miles just had check engine light come on had local shop put it on computer and said was throttle pedal postion sensor so i … read more
GM Tech (Cam)
GM Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
5,845 satisfied customers
97 buick lesabre: crank sensor, cam sensor, egr valve..gas pedal
my 97 buick lesabre runs sluggish, engine light is on, pulled codes - map sensor, crank sensor, cam sensor, egr valve, and random mis-fire codes appeared........i changed map and egr. car doesnt stutt… read more
Gary
Gary
GMC Technician
Vocational, Technical or Trade Scho
1,561 satisfied customers
2008 gmc: vortec..electical problems with..throttle..door locks
i have 2008 gmc serria vortec max that i'am have electical problems with. Some of syptoms i'm having are when i drive the vehicle and get on the throttle hard the door locks go up and down and the veh… read more
GM Tech (Cam)
GM Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
5,845 satisfied customers
1997 GMC: code p0141 so I replaced the Bank 1 Sensor 2..emission test
1997 GMC Jimmy I have 2 codes that I would like to fix P0140 and P0138. I first got code P0141 so I replaced the Bank 1 Sensor 2 and cleared the code. Took it to the emission test and now got 3 new co… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
1998 gmc: cab fan works on high speed..10 seconds..abs light comes
1998 gmc 3500 hd , cab fan works on high speed only . delays for about 10 seconds before it goes on. when i try to use lower speed the abs light comes on then the park brake light comes on. turn fan t… read more
GM Tech (Cam)
GM Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
5,845 satisfied customers
GMC: 2003 2500 hd..with 2900000 ( duramax )..controls..speedo and tac
I have a 2003 2500HD GMC with(NNN) NNN-NNNN(Duramax) . Yesterday all my gauges and window and radio controls were lost. The speedo and tac still work and the clock on the radio still come on. My dash … read more
GM Tech (Cam)
GM Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
5,845 satisfied customers
1998 GMC: 5.7L motor..p0340..replaced the plugs,wires, cap and rotor
Good Morning Dave, Thanks for the help with my PCM question, I have a second question if your are interested. I own a 1998 GMC Savana conversion van, it has the 5.7L motor, I am receiving a code of P0… read more
Dave Nova
Dave Nova
Auto Dealership Owner
Associate Degree
34 satisfied customers
2002 Silverado 1500: idles..Check engine light is NOT..oxygen sensors
My 2002 Silverado 1500 4.8 with 150K miles idles but when given gas starts spitting and "choking" out. Check engine light is NOT on. Recently had both catalytic converters replaced along with both oxy… read more
Ken
Ken
GM Auto Tech.
Vocational, Technical or Trade Scho
380 satisfied customers
98 GMC SAVANA 2500: V6 4.3L VAN..40 mph..IT MY BE THE SPEED SENSOR
I HAVE A 98 GMC SAVANA 2500 V6 4.3L VAN, THE PROBLEM IS MY SPEEDOMETER NEDDLE GOES UP TO 100 MPH WHEN IM DOING 40 MPH, AND AT THAT TIME THE TRUCK BUCKLES AND WONT TAKE GAS EVEN IF I FLOOR THE PEDDLE, … read more
Dave Nova
Dave Nova
Auto Dealership Owner
Associate Degree
34 satisfied customers
1998 GMC: intake gasket..it back together it looses power..O2 sensors
I changed the intake gasket on my 1998 GMC pickup. I had no problem with the repair, but after I got it back together it looses power at WOT. The O2 sensors drop to zero at WOT. The computer didn't ki… read more
GM Tech (Cam)
GM Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
5,845 satisfied customers
2003 gmc: misfire cylinder..spark plugs..clicking..runs fine
my 2003 gmc z71 1500 5.3 engine truck just died off one day going home, iheld the pedel down it started back up an drove home lucky i was up the steet from home when i got home it died again in the dr… read more
Shane
Shane
Vocational, Technical or Trade Scho
84 satisfied customers
Hello I have an 05 duramax..lit..whole climate control unit..bcm
Hello I have an 05 duramax, and my problem is my climate control it is not working only the lights on it and the knobs are lit,no display from the screen or any kind of temperature, I have checked all… read more
goodwrench9124
goodwrench9124
Lead Tech/ Shop Leader
Vocational, Technical or Trade Scho
2,571 satisfied customers
1993 gmc: coil..vacume leaks athe the intake and throttle body..hoses
i have a 1993 gmc pickup with a 5.7L i just put a new crate engine in it and it starts and goes dead over and over and over again i thought i had a ignition problem so i got a new distributer and coil… read more
ase_master327
ase_master327
Owner & Student
High School or GED
3,214 satisfied customers
2001 gmc: mass airflow sensor code..driving down the road
ok, i have a 2001 gmc jimmy. i keep getting a mass airflow sensor code, and when i am driving down the road, its like something sucks the power out of the engine, sort of like when you turn on the a/c… read more
Dave Nova
Dave Nova
Auto Dealership Owner
Associate Degree
34 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