Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

Check engine light not on with key on, Not on alt all with…

Check engine light not...

Check engine light not on with key on

Mechanic's Assistant: Does the light stay on, or does it blink?

Not on alt all with key on prior to crank

Mechanic's Assistant: What is the model/year of your Chevy?

1992 Silverado 350v8 4 wdrive

Mechanic's Assistant: Are you fixing your Silverado yourself? What have you tried so far?

Yes -performed tuneup replaced all sensors except knock

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Also takes 3-4 tries to crank running rich once warm runs just fine- some hesitation before it gets warm

Show More
Show Less
Ask Your Own Chevy Question
Answered in 2 minutes by:
12/23/2017
Pete
Pete, Auto Service Technician
Category: Chevy
Satisfied Customers: 32,211
Experience: 14 years GM dealer Technician.
Verified

Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.

Are you able to flash codes at all from the engine computer?

Let me know,thanks Pete.

Ask Your Own Chevy Question
Customer reply replied 5 months ago
No flash codes cannot creat

Are you saying the light will not flash at all?

Have you checked power and ground to the engine computer to make sure they are all present?

Ask Your Own Chevy Question
Customer reply replied 5 months ago
all seem to be the same no wiring changes recent
Customer reply replied 5 months ago
I have not checked at the computer

O.k., with it running rich when cold and no check engine light coming on this sounds like the common fault of the engine computer itself.The engine computer controls the check engine light and it should turn on this light when the key is on as well as flash codes.I have run into several cases where the engine computer fails internally causing this issue here with it needing to be replaced.

You will need to have the check engine light circuit tested leading from the computer to make sure this is the cause.I may be able to locate how to test this with a test light or multi meter if you want just let me know.

If more help is needed, use the reply tab to continue our conversation. If no further assistance is needed, kindly rate my service, your 5-star rating is appreciated ( should be a link to click on here or above).You can rate at any time and we can continue to work on your question as this will not close out your question.I work on delivering the best answer and help here but in some cases, it can be difficult to do without seeing the vehicle.

Thanks Pete

Ask Your Own Chevy Question
Customer reply replied 5 months ago
I had a windshield leak that when I pulled the computer to look I did find some corrosion on the connectors- I cleaned and scraped off the pins but couldn't do anything with plugs - other than spray cleaner and blow with air --could poor signal cause issue as well
Customer reply replied 5 months ago
Would like to have the how to test circuit with multi meter

If any water entered inside the engine computer through the connections it damaged the circuits fairly quick in the computer to where the computer has to be replaced.

Looking for the diagram info now will post back here shortly.

Ask Your Own Chevy Question

It looks like terminal A5 ( brown/white wire) at the ECM controls the check engine light.Usually, it should ground with the key first on to turn on the check engine light.If it does not right at the ECM itself then the ECM needs to be replaced.

https://www.dropbox.com/s/yzkdl12uocx5foh/eng-12-23.png?dl=0

Let me know if you need anything else and feel free to rate my help here or above ( should be a link to click on ) as this is how I receive credit for my time, this can be done at any time and you can still come back here and reply if needed.Your 5-star rating is appreciated

Thanks Pete

Pete
Pete, Auto Service Technician
Category: Chevy
Satisfied Customers: 32,211
Experience: 14 years GM dealer Technician.
Verified
Pete and 87 other Chevy Specialists are ready to help you
Ask your own question now
Was this answer helpful?
Ask Pete Your Own Question
Pete
Pete
Pete, Auto Service Technician
Category: Chevy
Satisfied Customers: 32,211
32,211 Satisfied Customers
Experience: 14 years GM dealer Technician.

Pete 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
Chevrolet: 6.6 duramax wont start all of a sudden . Turns
6.6 duramax won't start all of a sudden . Turns over great new fuel filter. A shot of either fires up and runs and pulls great but shut it off and try to restart no go. No previous problems.… read more
BOBBYSS
BOBBYSS
TECHNICIAN/ADVISOR
Associate Degree
8,343 satisfied customers
Chevrolet Uplander LS: my 2007 Chevy Uplander wont crank due
my 2007 Chevy Uplander wont crank due to the anti-theft system how do I get my car to crank… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,357 satisfied customers
My car starts but wont stay running (02 chevy impala)
My car starts but wont stay running? (02 chevy impala)… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,289 satisfied customers
1985 chevy silverado 350 engine. The engine has one bent
1985 chevy silverado 350 engine. The engine has one bent push rod, any idea why? I know it has higher lift cam but not sure exactly what comp cam is added.… read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
The air conditioner will shutdown, saying the engine is
the air conditioner will shutdown, saying the engine is running hot. The engine is not running hot. … read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,357 satisfied customers
Replaced engine in 2001 Chevy Silverado with 2007 engine
Replaced engine in 2001 Chevy Silverado with 2007 engine same size now it hard to start and has a crank sensor code replaced sensor no change are complete the same sensor are not put 2001 in 2007 engi… read more
Pete
Pete
Auto Service Technician
32,211 satisfied customers
Engine power is reduced light is on and engine power is
Engine power is reduced light is on and engine power is reduced … read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,357 satisfied customers
Check engine light flashing when driving past 40 mph, engine
Check engine light flashing when driving past 40 mph, engine vibrating when idle or moving slowly, slight delay of starting up engine, and car has trouble accelerating as fast as it used to do. … read more
Ron Z.
Ron Z.
- Chevy Tech -
Vocational, Technical or Trade Scho
2,734 satisfied customers
My 8.1 vortex chev engine in a 5500 truck. 2004. The engine
My 8.1 vortex chev engine in a 5500 truck. 2004 . The engine quits like you shut it off it restarts right away and runs good. This happened 7 times in 200 miles. … read more
roy
roy
Associate Degree
3 satisfied customers
2003 chevy silverado 4.8 engine reduced engine power light
2003 chevy silverado 4.8 engine reduced engine power light comes on no power … read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,289 satisfied customers
Running engine stops or attempt to start engine fails, in a
Running engine stops or attempt to start engine fails, in a manner consistent with fuel starvation. Recently solved by installation of new fuel pump/sender unit, Problem has resumed approx two months … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
Engine rattle noise when cruising on V4 to V8. Front engine;
engine rattle noise when cruising on V4 to V8 JA: Where exactly do you think the noise is coming from? And how long has this been going on? Customer: Front engine; 3-4 weeks JA: What is the model/year… read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
362 satisfied customers
Chevrolet Malibu: Chevy malibu wont start suddenly. No problems
Chevy malibu won't start suddenly. No problems before. No fuel smell. It's fuel injected. 2002.… read more
Pete
Pete
Auto Service Technician
32,211 satisfied customers
My keyless remote doesn't work...whenever i try to open the
My keyless remote doesn't work...whenever i try to open the car using the remote is doesn't work. After I program the key fob it will work for about two minutes. Its not a battery problem in the key f… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,289 satisfied customers
Chevrolet Traverse LS: Our 2011 traverse will not start...wont
Our 2011 traverse will not start...won't even turn over. When we turn the key we here a series of clicks and that is all we have replaced the starter as well as the battery and have checked all fuses.… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,357 satisfied customers
Chevrolet silverado: how to reset anti theft
how to reset anti theft… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,289 satisfied customers
2005 Chevy Impala - wont start. All symptoms indicate the
2005 Chevy Impala - won't start. All symptoms indicate the passlock system is causing the problem. Get clicking noise when inserting key however all lights and radio work. Security light flashing. Kee… read more
John
John
Master A.S.E Automotive technician
2 YEARS COLLEGE
4,071 satisfied customers
Where is the fuel filter located on a 2004 chevy suburban?
where is the fuel filter located on a 2004 chevy suburban?… read more
goodwrench9124
goodwrench9124
Lead Tech/ Shop Leader
Vocational, Technical or Trade Scho
2,571 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