Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Chevy
This answer was rated:

I have a 2005 Chevy Cobalt I have no spark but I have

injector pules, I just changed...
I have a 2005 Chevy Cobalt I have no spark but I have injector pules, I just changed motors, the motor ran good except for Rod knocking. I didn't think it was crank sensor because I have injector
Show More
Show Less
Ask Your Own Chevy Question
Answered in 12 minutes by:
10/16/2017
TIM MOHR
TIM MOHR, ASE MASTER TECH
Category: Chevy
Satisfied Customers: 16,315
Experience: 30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
Verified

Hi, my name is ***** ***** you pulled codes from the computer yet?

Ask Your Own Chevy Question
Customer reply replied 4 months ago
no codes

ok, then this is most likely a bad ignition control module, have you checked to see if there is an rpm signal on a scanner, when cranking?

Ask Your Own Chevy Question
Customer reply replied 4 months ago
I switch module from the know good one, my tach reads wile cranking, I also have injector pules

ok, are you at the vehicle now?

Ask Your Own Chevy Question
Customer reply replied 4 months ago
no
Customer reply replied 4 months ago
i can get to it I will have to change to my phone

it is coomon for the ignition switch to go bad on these, the switch sends power to the ICM on the pink wire, you need to check the voltage of at the pink wire and see if it has full voltage with the key on, if it does, then crank it over and see if the voltage drops, if it does, then the ignition switch is bad, can you check this?

Ask Your Own Chevy Question
Customer reply replied 4 months ago
give me 5m

no worries

Ask Your Own Chevy Question
Customer reply replied 4 months ago
I do have voltage there what should I see in volts Ill get my meter, I used my test light and do u have a wiring of that plug

the pink wire should have battery voltage with the key on, then hold that voltage while cranking, you need to use a voltmeter, not a test light,Tim

Ask Your Own Chevy Question
Customer reply replied 4 months ago
I hv 12.5 volts key on and 10 to 11 while cranking

is the battery fully charged?

Ask Your Own Chevy Question
Customer reply replied 4 months ago
I had on charge earlier cranking sounds fine Ill put back on, I'm wrapping up for the day am I able to contact you again tomorrow if so is there some points I can check, also am I correct in thinking that since I have injector pulse then I don't have a problem with the crank sensor

yes,if you have injector pulse, and also rpm when cranking, then its nt the crank sensor,Tim

Ask Your Own Chevy Question
Customer reply replied 4 months ago
Hey I'm back at it, is there something at the coil I could check to see if Its getting a RPM signal, so fare I have 12v on pink wire and ground on the black. open?

the pink wire at the ignition module?

Ask Your Own Chevy Question

check for power going into the coil, and if you have power, then instll a noid light on the coil connector and crank it, if the noid lights flash, then the coil is bad, if they dont, then the ignition module is not sending the ground signals to fire the coil,Tm

Ask Your Own Chevy Question
Customer reply replied 4 months ago
I believe the brown wire is a the reference wire if that's correct put the noid light between the two ?

I dont have the colors, but you put the noid light between the 3rd and 4th pins, and crank it,Tim

Ask Your Own Chevy Question
Customer reply replied 4 months ago
I think brown is it do u have any thing that will show those pins like a diagram? I haven't bee able to find a good schematic of the coil wires

unfortunately I do not have a pinout diagram,sorry

TIM MOHR
TIM MOHR, ASE MASTER TECH
Category: Chevy
Satisfied Customers: 16,315
Experience: 30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
Verified
TIM MOHR and 87 other Chevy Specialists are ready to help you
Ask your own question now
Customer reply replied 4 months ago
thanks for your help

Anytime my friend,Tim

Ask Your Own Chevy Question
Customer reply replied 3 months ago
Hey a little FYI I found the problem with that vehicle, GM uses a multi ground connector to the front of the transmission and even though that connector looked good I cut the connector off and crimped and sutured a new end on, I borrowed a better scan tool then my reader a GM tech 2, I noticed every time I tried to start the car it would go out so I started looking for ground places. Thanks for your time.
Was this answer helpful?
Ask TIM MOHR Your Own Question
TIM MOHR
TIM MOHR
TIM MOHR, ASE MASTER TECH
Category: Chevy
Satisfied Customers: 16,315
16,315 Satisfied Customers
Experience: 30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

TIM MOHR 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 am curious of what the possible mechanical consaquences
I am curious of what the possible mechanical consaquences would be of by passing the Cadillac converter on my 2000 chevy 1500 truck… read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
I have a 05 chevy tahoe with an suspected evap issue, when
i have a 05 chevy tahoe with an suspected evap issue, when filling the tank up with gas the fuel pump at the gas station shuts off, if I continue to pump gas into the nozzle of my truck it will overfl… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
In my 2010 Chevrolet Impala I can't get the gears to move
In my 2010 Chevrolet Impala I can't get the gears to move from the parked position. It cranks and runs fine though. I have no idea what the problem is . … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
Misfiring and run rough when heater or ac is turned on. No
Misfiring and run rough when heater or ac is turned on … read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
Check Engine light comes on at ~72 mph, 2800 rpms. Have
Second opinion] Check Engine light comes on at ~72 mph, 2800 rpms. Have replaced plugs and coils because the code suggests a point misfire… read more
GM Bob
GM Bob
Automobile Technician
High School or GED
1,006 satisfied customers
Noticed shiny liquid underneath, 2001 Silverado. Next day ac
Not yet. Figured i'd wait till winters over. has been 80 the last two days … read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
247 satisfied customers
Have a 2007 duramax losing about a gallon of coolant a day.
Have a 2007 duramax losing about a gallon of coolant a day. Have pressure check static and running holds steady. No leaks or puddles found. Will turbo do this as it is liquid cooled… read more
Gary
Gary
Senior Technician
Vocational, Technical or Trade School
77 satisfied customers
I changed the cam shaft and crank shaft sensor and still
I changed the cam shaft and crank shaft sensor and still having the cam shaft sensor code show up and truck is running rough … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
2010 ss Camaro skip's when foot is on the brake while in
2010 ss Camaro skip's when foot is on the brake while in drive … read more
Jared D
Jared D
Shop Supervisor
Bachelor\u0027s
3 satisfied customers
Fuse is good but no power is making it two gmc truck seat
fuse is good but no power is making it two gmc truck seat switch … read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
247 satisfied customers
I have 2003 Envoy just gave me a trouble code P0014. P0014
I have 2003 Envoy just gave me a trouble code P0014 … read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
247 satisfied customers
I have a 2002 Silverado 1500hd with two codes on for the
I have a 2002 Silverado 1500hd with two codes on for the knock sensor and for b2647 code for the ambient light senso … read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,289 satisfied customers
On my son's 98 lumina, turning key only honks horn, car
On my son's 98 lumina, turning key only honks horn, car won't start. He went out of town before getting it looked at, so now he's stuck there. Just had intake manifold gasket replacement, technician h… read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
I have a 2011 2500dh. with a EGR delete, straight exhaust,
I have a 2011 2500dh. with a EGR delete, straight exhaust, two filter high lift fuel pump. just purchase it, it is throwing a PO191 code engine light. the only problem I see is engine light on and los… read more
Gary
Gary
Senior Technician
Vocational, Technical or Trade School
77 satisfied customers
1988 chevy g30 6.2 diesel van won't start fuel light came
1988 chevy g30 6.2 diesel van won't start fuel light came under load now on all the time died won't start changed fuel filter no change… read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
I have a 3.1 engine in a 98 cutlass. once and a while, there
I have a 3.1 engine in a 98 cutlass. once and a while , there is a problem with the idle. It will stumble, and stall. so far it seems to goes away with a few steps on the gas pedal. After it stops stu… read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
Car battery died. Radio, Windows and locks worked. Put it
Car battery died. Radio, Windows and locks worked. Put it neutral to back it up to get a jump … read more
Todd M
Todd M
Owner
ASE Certification
1,587 satisfied customers
2013 chevy malibu i need the procedure to replace the water
2013 chevy malibu i need the procedure to replace the water pump 2.5 engine. is it hard , do i need to do any thing with the timing… read more
Ron Z.
Ron Z.
- Chevy Tech -
Vocational, Technical or Trade Scho
2,734 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