Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Chevy

I have a problem with car 96 impala SS. Car run minutes then

Customer Question
Hi I have a problem...
Hi I have a problem with car 96 impala SS. Car run for 10 minutes then shut off and have no injectors pulse and spark. Sometimes won't start till next day. . I change icm,coil,coolant sensor, what am I missing
Submitted: 1 year ago.Category: Chevy
Show More
Show Less
Ask Your Own Chevy Question
Answered in 2 hours by:
12/4/2015
Chevy Mechanic: Eddie, ASE Certified Technician replied 1 year ago
Eddie
Eddie, ASE Certified Technician
Category: Chevy
Satisfied Customers: 3,187
Experience: I have 20 years professional experience in advanced engine controls and transmission rebuilding.
Verified

Hello, my name is ***** ***** I will do all I can to help. This may be a tough one to figure out over the internet, but I'm just going to through some things out there to help hopefully narrow it down first. When it doesn't start after running 10 minutes, If you just turn the key to the ON position, and don't try to start it, does the CHECK ENGINE light come on in the dash? Check engine light should come on everytime you turn the key to the ON position. See if you can correlate the light not coming on with it not starting and let me know what you find there.

Ask Your Own Chevy Question
Customer reply replied 1 year ago
It's always on. I have low resolution on the crank sensor, torque convertor,
Chevy Mechanic: Eddie, ASE Certified Technician replied 1 year ago

Do you have a scanner that you can see what the crank sensor is doing? if so, are you getting an input from the crank sensor? Also, by chance did the transmission get replaced anytime recently and then this problem start occuring? thanks.

Ask Your Own Chevy Question
Customer reply replied 1 year ago
I don't have the scanner until 9pm tonight. The tranny was never replace since I own the car 3 years ago. Is the fone call $18 per call or you pay once and all you can call ?
Chevy Mechanic: Eddie, ASE Certified Technician replied 1 year ago

I'm not sure on the billing end. I'm just a technician here. Have you got a spare key by chance? That vehicle has the ole pass lock GM security system key on it. Does that light go out? and will it crank at all when it doesn't start? I'm thinking Pass lock related.

Ask Your Own Chevy Question
Customer reply replied 1 year ago
The car crank but no start. No injectors pulse and spark.
Customer reply replied 1 year ago
It's been sitting since 10am this morning. Now she should start right up
Chevy Mechanic: Eddie, ASE Certified Technician replied 1 year ago

OK, Make sure the check engine light comes ON, and the security light comes on for a couple seconds and goes OUT. Just get in the habit of turning the key ON first, and watch those lights. then attempt to start it. Let me know if the check engine light doesn't come on by chance when it won't start with key ON, and let me know if the security light goes out after a couple of seconds of turning the key to the ON position before starting.

Ask Your Own Chevy Question
Customer reply replied 1 year ago
Ok she start. I'm gonna let it run till its shut down then I'll look at the check engine light
Customer reply replied 1 year ago
Ok she just shut down again. The security light goes out after a couple of seconds but the check engine light stay on
Chevy Mechanic: Eddie, ASE Certified Technician replied 1 year ago

go Check engine light should stay on with key on, and security light should go out with key on. all that checks out. You looked at the crank sensor harness well and didn't see any fraying or chafing correct? See if you can see a nice square wave of the crank sensor if you can get a scanner that good. If you can see a square wave from the crank sensor, and still don't have injector pulse, with the security light being out, I'm going to say that the ECM itself could be the culprit. Let me know what you find there.

Ask Your Own Chevy Question
Customer reply replied 1 year ago
The electronic shop check the harness and said it's ok. My scanner won't see the wave. Where do I go to get another ecm ? Will local auto part have access to one ?
Customer reply replied 1 year ago
Or can I borrow one from the same car to see if its stay running?
Chevy Mechanic: Eddie, ASE Certified Technician replied 1 year ago

yes you could, at this point if I had an ECM to swap I believe I would try it. make sure it comes out of the same year car (95 and 96 should be same, but double check numbers on the ECM itself). With the Key ON, do you have 12 volts to the injector power wire, should be constant 12 volts to one of the wires going to the injector.

Ask Your Own Chevy Question
Customer reply replied 1 year ago
I check it with no idea light and I have no flashing. Do I still have to check for 12 volt? So Is the injectors on a negative pulse
Customer reply replied 1 year ago
Noid
Chevy Mechanic: Eddie, ASE Certified Technician replied 1 year ago

Yes, injectors are on a neg. pulse, one wire will be constantly hot with 12 volts. check it with a regular test light with key ON.

Ask Your Own Chevy Question
Customer reply replied 1 year ago
I do have 12volt key on.
Chevy Mechanic: Eddie, ASE Certified Technician replied 1 year ago

Its highly possible, unplug it, and leave it unplugged, see if it will start and idle unplugged. If it does, put another one on it. Let me know what happens.

Ask Your Own Chevy Question
Chevy Mechanic: Eddie, ASE Certified Technician replied 1 year ago

Hey, any luck with that test? Tell me it's running!

Ask Your Own Chevy Question
Customer reply replied 1 year ago
Change out a maf sensor but still no
Chevy Mechanic: Eddie, ASE Certified Technician replied 1 year ago

Do you have a noid light? to plug into the injector harness to see if it has got any injector pulse?

Ask Your Own Chevy Question
Customer reply replied 1 year ago
tested already. No injectors pulse and spark when it's not running
Chevy Mechanic: Eddie, ASE Certified Technician replied 1 year ago

Alright, I can only suggest getting a scanner capable of checking that crank sensor input to the ECM, if it had the correct signal to the ECM, I would say the ECM has failed. But, no way to know for sure without those tools, Let me opt out in case another expert has a suggestion. Thank you.

Ask Your Own Chevy Question
Customer reply replied 1 year ago
My scanner showing too fewer pulse from the crank sensor
Chevy Mechanic: GM Bob, ASE Certified Technician replied 1 year ago
GM Bob
GM Bob, ASE Certified Technician
Category: Chevy
Satisfied Customers: 1,154
Experience: 30 plus years. experience as GM technician, ASE Master Technician and GM Certified.
Verified

Hello my name is ***** ***** I can help.

Have you done anything with the distributor that is behind he water pump?

I have a link that has the diagnostic for no spark. The distributor also controls the injectors.

I have had a lot for problems with this distributor causing stalls and running rough.

https://www.dropbox.com/s/lf67ie0e7dolf0z/1996%20Impala%20Distributor.pdf?dl=0

Please let me know if this helps or if you need help with the diagnostic chart

Thank you

Ask Your Own Chevy Question
Ask GM Bob Your Own Question
GM Bob
GM Bob
GM Bob, ASE Certified Technician
Category: Chevy
Satisfied Customers: 1,154
1,154 Satisfied Customers
Experience: 30 plus years. experience as GM technician, ASE Master Technician and GM Certified.

GM Bob 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

15,249 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,196 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,847 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

2,900 satisfied customers

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

Ron Z.

Ron Z.

- Chevy Tech -

2,682 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
My equinox is running hot, I've change the water pump,
my equinox is running hot, I've change the water pump, thermostat. system has been bleed, air pockets remover, by certified tech. now it running hot while just idling, but it doesn't stay hot goes bac… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,000 satisfied customers
How much Labor to remove and replace water pump 2004
how much Labor to remove and replace water pump 2004 chevrolet express 3500 6 liter with ac… read more
Ron Z.
Ron Z.
- Chevy Tech -
Vocational, Technical or Trade Scho
2,682 satisfied customers
Ron. I have 06 Chevy impala SS 5.3 I had the water pump
Hello Ron. I have 06 Chevy impala SS 5.3 I had the water pump replaced 1 yr ago due to leaking. Noticed a couple weeks ago my temperature gauge rising while city driving I turned the heat on immediate… read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
On my Chevy 350 I have a electric water pump. There is an
On my Chevy 350 I have a electric water pump. There is an extra hole I believe a water bypass hole that coolant is leaking out of. I'm guessing I have to block it? What thread and bolt size is it or i… read more
Joecamel90
Joecamel90
Technician
Associate Degree
24 satisfied customers
My 92 Chevy pickup truck runs hot change radiator water pump
My 92 Chevy pickup truck runs hot change radiator water pump thermostat up and lower radiator hose and still runs hot … read more
rpmdiag
rpmdiag
High school
7,108 satisfied customers
I need the labor cost on a 99 6.5 water pump replacement, No
I need the labor cost on a 99 6.5 water pump replacement … read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
I have replaced, the water pump, thermostat, and radiator on
i have replaced, the water pump, thermostat, and radiator on my 2002 cavalier, but it is still overheating. what could be the problem? … read more
roy
roy
Associate Degree
3 satisfied customers
Im not sure how to access water pump and the current tool
Im not sure how to access water pump and the current tool that i rented from oreillys doesnt clear the metal plate in front of the intake cam is there a different tool required? … read more
Tim&#039;s Auto Repair
Tim's Auto Repair
mechanic
High School or GED
8,847 satisfied customers
I have a 2003 Tahoe. I've replaced the water pump,
I have a 2003 Tahoe. I've replaced the water pump, thermostat. the tuck runs about 190 with ac on or off, until its over 90 degrees out. then running the ac the truck will get hot. turn the ac off and… read more
TIM MOHR
TIM MOHR
SHOP OWNER
Master's Degree
8,037 satisfied customers
2004 Duramax LLY Losing coolant. Replaced the water pump.
2004 Duramax LLY Losing coolant. Replaced the water pump. Every 700miles gets low coolant. Have to add. No visible leaks. No mix in the oil. Had mechanic do pressure test. All came back good. Truck ru… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,249 satisfied customers
94 chevy 5.7, someone took water pump and fan off. Trying to
94 chevy 5.7, someone took water pump and fan off. Trying to put back together. They put an aftermarket. Fan with spacer. As i look at the front of motor fan turns counter clockwise, however fan is ma… read more
Jared D
Jared D
Shop Supervisor
Bachelor\u0027s
3 satisfied customers
Its over heating. Changed thermostat and water pump. Also a
Its over heating. Changed thermostat and water pump. Also a combustion test … read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,196 satisfied customers
Changed water pump on corvette. started and ran to operating
changed water pump on corvette. started and ran to operating temp. car stalled and will not re start. … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
05 Tahoe changed water pump and coolant temp. sensor but its
05 Tahoe changed water pump and coolant temp. sensor but its still running hot? … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
It overheated. I ended up replacing the water pump and the
It overheated. I ended up replacing the water pump and the thermostat now I get a P00b7 code … read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
95 c1500 replaced water pump and now is overheating,,wasn't
95 c1500 replaced water pump and now is overheating,,wasn't before replacement … read more
mike switzer
mike switzer
686 satisfied customers
My 2003 Chevy Malibu is overheating. Thermostat, water pump,
My 2003 Chevy Malibu is overheating. Thermostat, water pump, and reservoir tank have all been replaced. hoses have been removed and cleaned out. … read more
roy
roy
Associate Degree
3 satisfied customers
Changed all the belts new water pump and alternator and it
changed all the belts new water pump and alternator and it still squealing can you help … read more
roy
roy
Associate Degree
3 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