Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Chevy

2002 chevy blazer: trouble codes..P1683,P0155, P0128, P0135, P0101

Customer Question
I am working on a...
I am working on a 2002 chevy blazer, 4.3 engine. It gave me 5 trouble codes to start with, P1683,P0155, P0128, P0135, P0101. I did a complete tune up with plugs, wires, cap and rotor. I erased all the codes. The mass air sensor kept coming on until I replaced it. I do not have any check engine lights on now. Engine performance is very slugish and will not reach 55 mph. fuel pressure is running about 60 psi. checked timing with otc scanner and it is set at 8 degrees and when I turn the distributer clockwise to retard the timing it increases the timing. I feel like it is the computer.
Submitted: 9 years ago.Category: Chevy
Show More
Show Less
Ask Your Own Chevy Question
Answered in 4 minutes by:
10/6/2008
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 9 years ago
AMEDEE
AMEDEE, CHEVY TECHNICIAN
Category: Chevy
Satisfied Customers: 27,106
Experience: ASE certified tech ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
Verified

Hello!

 

So there are no codes at this time?

Ask Your Own Chevy Question
Customer reply replied 9 years ago
No codes showing at this time.
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 9 years ago
Does it run better with the mass air flow sensor disconnected?
Ask Your Own Chevy Question
Customer reply replied 9 years ago
Have only replaced it with a new one. that was the only way I could keep the P0101 code from coming back. Have not tried it without. It tends to want to surge while you are trying to build speed.
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 9 years ago

Does fuel pressure hold steady?

 

Any air or vacuum leaks?

Ask Your Own Chevy Question
Customer reply replied 9 years ago
No vacume leaks. Fuel pressure held at 55 psi for over 3 hours and while sitting Ideling.
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 9 years ago

Sounds like plugged exhaust. The easiest way to check for this is to hook up a vacuum gage to any vacuum source from the intake manifold. It should read about 17 to 19 inches of steady vacuum at idle. Upon snapping the throttle quickly to about 3000 rpm and letting off back to idle, you should see the vacuum gage go from steady 18 inches of vacuum to 0, back past 18 inches of vacuum, to about 23 or 24 inches of vacuum back to about 18. If it does not go back past 18 inches to 23 or 24 before returning to 18 something in the exhaust is definitely plugged up.

 

Or you can always pull the o2 sensors and see if it makes any difference. :)

Ask Your Own Chevy Question
Customer reply replied 9 years ago
I will give it a try. The vacume looked good from the scanner, but i will try a vacume guage in stead. There was a code P1683 that I could not find the definition of but when I cleared the codes it did not come back.
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 9 years ago

P1683

 

CIRCUIT DESCRIPTION
The powertrain control module (PCM) electrically erasable programmable read only memory (EEPROM) contains data which is essential for operating the engine and the transmission. The PCM continuously tests the integrity of this data.

CONDITIONS FOR RUNNING THE DTC
The ignition switch is in the crank position or in the run position.

CONDITIONS FOR SETTING THE DTC
The PCM is unable to correctly read the data from the flash memory.

ACTION TAKEN WHEN THE DTC SETS


The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records.
CONDITIONS FOR CLEARING THE MIL/DTC


The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
Clear the MIL and the DTC with a scan tool.
DIAGNOSTIC AIDS

IMPORTANT: Remove any debris from the PCM connector surfaces before servicing the PCM. Inspect the PCM connector gaskets when diagnosing or replacing the PCM. Ensure that the gaskets are installed correctly. The gaskets prevent water intrusion into the PCM.

Replace the PCM even if this diagnostic trouble code (DTC) exists only in history

AMEDEE
AMEDEE, CHEVY TECHNICIAN
Category: Chevy
Satisfied Customers: 27,106
Experience: ASE certified tech ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
Verified
AMEDEE and 87 other Chevy Specialists are ready to help you
Ask your own question now
Customer reply replied 9 years ago
Thank you for your time and help. This is my neighbors vehicle and I was trying to help him, but it sure has burned alot of my time. Thanks.
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 9 years ago

Thanks for the accept!

 

Good luck!

Ask Your Own Chevy Question
Ask AMEDEE Your Own Question
AMEDEE
AMEDEE
AMEDEE, CHEVY TECHNICIAN
Category: Chevy
Satisfied Customers: 27,106
27,106 Satisfied Customers
Experience: ASE certified tech ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector

AMEDEE 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
I'm at work idiling. And the clean exhaust filter came on my
and the clean exhaust filter came on my 2009 diesel how do you do tbis … read more
Eric
Eric
Auto Technician
589 satisfied customers
Exhaust fluid light 2011 gmc minus 9 degrees this morning
exhaust fluid light 2011 gmc minus 9 degrees this morning does this freeze … read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
I got the “clean exhaust filter now” message two days ago
I got the “clean exhaust filter now” message two days ago and then it went away … read more
Jared D
Jared D
Shop Supervisor
Bachelor\u0027s
3 satisfied customers
The LOW Level Diesel Exhaust Fluid notice will not go away,
The LOW Level Diesel Exhaust Fluid notice will not go away, I added fluid 2 days ago … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
Same issue, as on this screen. 2011 duramax, service exhaust
same issue, as on this screen. 2011 duramax, service exhaust system - see owners manual. Have snap on code reader, no error codes present. 162k miles.… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
Fuel coming out exhaust. Turned into a gas hog. Chevy half
they changed plugs plug wires injectors and the truck runs rough and mileage is down and holding your hand at the exhaust you can feel droplet of unburent fuel … read more
Expert
Expert
15 satisfied customers
My engine light went on yesterday The code is P0013. Exhaust
My engine light went on yesterday The code is P0013 … read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
I just purchased a 2013 Chevy duramax. The exhaust fluid was
I just purchased a 2013 Chevy duramax. The exhaust fluid was at 16 % and at that time the check engine light came on. Could they be related? … read more
Todd M
Todd M
Owner
ASE Certification
1,487 satisfied customers
Clean exhaust filter, see owners manuel. 2500 hd 100,800
I have always had it serviced before warning but can't get it in till Monday, just wondering if I can change it myself … read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
Engine light on" clean exhaust filter continue to dric. Ve
engine light on " clean exhaust filter continue to dric … read more
BOBBYSS
BOBBYSS
TECHNICIAN/ADVISOR
Associate Degree
8,343 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
7,284 satisfied customers
I need to replace exhaust manifolds on a 1970 Chevy 1/2 tin
I need to replace exhaust manifolds on a 1970 Chevy 1/2 tin stock 450 2 barrel Automatic what would be the best manifold for fuel economy… read more
camerontech
camerontech
20 year experience diagnostic technician
class a
560 satisfied customers
Where is the Exhaust Cam Position Actuator Solenoid located
Where is the Exhaust Cam Position Actuator Solenoid located on 93 GMC Serra Trunk ? … read more
Joecamel90
Joecamel90
Technician
Associate Degree
24 satisfied customers
We are having smoke out of the exhaust after idialing for
we are having white smoke out of the exhaust after idialing for awhile. … read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
What's exhaust manifold gasket is better the steel one or an
What's exhaust manifold gasket is better the steel one or an aftermarket one that feels like rubber. I took my catalyic converter off my Chevy Malibu and it has two steel gaskets is that normal? 2005 … read more
Kevin
Kevin
workshop foreman /master tech/mot tester
0 satisfied customers
Exhaust smell with a/c on and windows closed. No it has been
we have mechanics at the factory they checked the exhaust mnaifold and a/c intake but could not pinpoint it we can take it to the dealer if needed … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
There is some exhaust fumes getting in the car, 1988 Chevy
Hi, there is some exhaust fumes getting in the car, 1988 Chevy Coup, need a mechanic to fix it… read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
Cleaning exhaust fluid message then goes into engine power
Cleaning exhaust fluid message then goes into engine power reduced. Anything I can do we are in the boonies … 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