Wont crank

Tiny
LONGORIA214
  • MEMBER
  • 2008 PONTIAC G6
  • 3.5L
  • V6
  • FWD
  • AUTOMATIC
  • 166,000 MILES
Car will not crank after it gets hot. Once it cools down it will crank up. Frustated
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Monday, July 11th, 2016 AT 6:16 PM

13 Replies

Tiny
FREEMBA
  • EXPERT
* Does your temperature gauge tell you that the engine is overheating?
* Are there any visual signs that the engine is overheating?
* How often do you have to add coolant?

If the engine is overheating it would behave this way. Let me know the answers to these questions and then we can go a bit further in the diagnostic process.
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Monday, July 11th, 2016 AT 7:10 PM
Tiny
LONGORIA214
  • MEMBER
Sorry, I did not make my self clear. The car is not overheating up. What I meant to say about getting was hot was the starter. I have checked the battery, alternator, starter they checked out good.I did replace the ground wire to the battery because it was corroded. I also replaced the ignition switch thinking that would fix my problem, but it still doing the same thing.
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Monday, July 11th, 2016 AT 7:29 PM
Tiny
FREEMBA
  • EXPERT
If you replaced the negative battery cable and are sure that the connections are clean and tight, perform a Voltage Drop test on the positive battery cable.

To do this you will need a Digital Volt meter. Set the voltmeter on the 2v scale.
Connect the positive(+) voltmeter lead to the positive battery cable (at the battery), be sure it makes a good connection.
Connect the negative(-) voltmeter lead to the positive battery terminal stud on the starter, be sure it makes a good connection.
Have an assistant to crank the engine over. Record the reading on the voltmeter, while the engine is cranking.
There should be a reading of 0.2V or less.

To check the negative side of the starting system, Connect the positive(+) voltmeter lead to the Negative battery cable (at the battery), be sure it makes a good connection.
Connect the negative(-) voltmeter lead to a clean spot on the case of the starter.
Have an assistant to crank the engine over. Record the reading on the voltmeter, while the engine is cranking.
There should be a reading of 0.3V or less.

If excessive resistance is found clean the battery cable ends and terminals. Clean the place on the engine where the negative cable attaches. Retest. If excessive resistance is still present, replace the faulty cable.

If excessive resistance is not found, remove the starter and have it tested at a local auto parts store (many of them will test it for free!)
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Monday, July 11th, 2016 AT 9:11 PM
Tiny
LONGORIA214
  • MEMBER
Okay, I will try that this afternoon. Starter has been tested and that is okay. Anything else you think it could be?
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Tuesday, July 12th, 2016 AT 6:47 AM
Tiny
CJ MEDEVAC
  • EXPERT
Different person.

"The Starter"

Bench testing at the auto store proves that it runs, they cannot simulate the heat and the load on it, short of putting it on another vehicle.

Just a last resort possibility!

I will give you all the information I got before you tear your hair out, or unwisely spend money.

Link follows, see my awesome answers in it!/ BE SURE TO CHECK OUT the link in it near the end! "TRT41" is the best now!, "TRT30" is pretty good!

https://www.2carpros.com/questions/1996-chevrolet-tahoe-wont-start-sounds-dead-battery-jumpbox-get-same-reults

Return with good news!

The Medic

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Tuesday, July 12th, 2016 AT 5:09 PM
Tiny
JOHNNY G.JR
  • MEMBER
Some starters will not turn over when hot. I had a 1973 Firebird with headers. When the starter got hot, the starter would not crank, when cooled down started fine. I replaced with high torque starter. Problem gone.
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Tuesday, July 12th, 2016 AT 8:04 PM
Tiny
LONGORIA214
  • MEMBER
Just replaced the positive cable because it was showing some wire I guess where the wire was hitting the manifold. Maybe that will fix my problem. Crossing my fingers.
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Tuesday, July 12th, 2016 AT 9:58 PM
Tiny
LONGORIA214
  • MEMBER
Still having the same issue.
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Wednesday, July 13th, 2016 AT 12:59 PM
Tiny
KEN
  • ADMIN
Yep lets please try replacing the starter, here is a link to a good AC Delco unit.

Great instructions by FreeMBA, one of our best online mechanics at his best!

https://www.amazon.com/gp/product/B007QBU5IS/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&tag=2carprcom-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B007QBU5IS&linkId=d75d2b4665e6f3563ed5a95328323982

Let us know how it goes so i will help others.

Best, Ken

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Friday, July 15th, 2016 AT 9:57 AM
Tiny
LONGORIA214
  • MEMBER
Starter is not the issue
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Friday, July 15th, 2016 AT 11:15 AM
Tiny
KEN
  • ADMIN
Have you replaced it, or just tested it at the parts store? If you are certain its not the problem then the only other thing I can thing of is the ground strap between the engine and frame either is missing or loose.
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Friday, July 15th, 2016 AT 11:58 AM
Tiny
LONGORIA214
  • MEMBER
How do I program my ecm?
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Thursday, July 28th, 2016 AT 12:25 PM
Tiny
SATURNTECH9
  • EXPERT
Just to add to this one what's going on that you want to program your ecm?That takes the dealer or someone that has the expensive scan tool that will program. When the buy the calibration files from the manufacturer. So when it won't start is the security light on solid or flashing with the key in the run position?
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Thursday, July 28th, 2016 AT 12:47 PM

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