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Starting problem

Tiny
GKTAYLOR619
  • MEMBER
  • 2011 BUICK LA CROSSE
  • 3.6L
  • V6
  • 2WD
  • AUTOMATIC
  • 90,000 MILES
Car hard to start when cooled off, clicks and after next try hesitates/drags but starts. Changed battery, sensor, and checked starter and alternator and they are all fine.
Wednesday, October 24th, 2018 AT 5:48 AM

14 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning.

Does it sounds like a low battery?

Can you tell me the voltage os the battery in the morning before you start it? It may have a draw draining the battery overnight.

Also, the voltage at the battery with the engine running?

Roy

https://www.2carpros.com/articles/how-to-check-a-car-alternator

https://www.2carpros.com/articles/car-battery-load-test
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Wednesday, October 24th, 2018 AT 5:54 AM
Tiny
GKTAYLOR619
  • MEMBER
  • 8 POSTS
It is 14.7.
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Wednesday, October 24th, 2018 AT 6:00 AM
Tiny
GKTAYLOR619
  • MEMBER
  • 8 POSTS
Bought a brand new battery; voltage drops to 14.4 and goes back to 14.7.
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Wednesday, October 24th, 2018 AT 6:01 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
14.7 when?

I need the voltage cold with the key off and then with it running.

I assume 14.7 is running which is a little high. Does that make sense?

Roy
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Wednesday, October 24th, 2018 AT 6:02 AM
Tiny
GKTAYLOR619
  • MEMBER
  • 8 POSTS
14.4 when cold and 14.7 when running.
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Wednesday, October 24th, 2018 AT 6:05 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
14.4 volts when not running is no good.

It should be 12.6 volts. If you have 14.4 volts the battery is sulfated or shorted.

Roy
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Wednesday, October 24th, 2018 AT 6:13 AM
Tiny
GKTAYLOR619
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  • 8 POSTS
Okay.
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Wednesday, October 24th, 2018 AT 6:17 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Keep me updated on what is happening.

Roy
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+1
Wednesday, October 24th, 2018 AT 6:23 AM
Tiny
GKTAYLOR619
  • MEMBER
  • 8 POSTS
Thank you and will do!
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Wednesday, October 24th, 2018 AT 12:42 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Feel free to ask any follow up questions.

Roy
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Wednesday, October 24th, 2018 AT 1:23 PM
Tiny
GKTAYLOR619
  • MEMBER
  • 8 POSTS
Good morning, so I checked it again yesterday after sitting all day and the voltage was 10.5 and dropped to 10.1 as I watched before cranking. Also, when it finally cranks, the hazard lights come on?
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Thursday, October 25th, 2018 AT 5:54 AM
Tiny
ASEMASTER6371
  • MECHANIC
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OK, thats no good. Thats why the 4 ways are flashing. Low voltage

you need to test for a parasitic draw. Remove the negative cable and put your voltmeter in line with the battery and negative cable. Set the meter to dc amps. Let it sit for 30 minutes to let the modules go to sleep. Then see what the draw is in amps. It should be 50-75 milli amps.

Roy
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Thursday, October 25th, 2018 AT 6:13 AM
Tiny
GKTAYLOR619
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Ok, will do. Thanks
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Thursday, October 25th, 2018 AT 6:43 AM
Tiny
ASEMASTER6371
  • MECHANIC
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Your welcome

Always glad to help

Roy
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Thursday, October 25th, 2018 AT 8:00 AM

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