Starting problem

2011 BUICK LA CROSSE
90,000 MILES • 3.6L • V6 • 2WD • AUTOMATIC
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GKTAYLOR619
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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.
Oct 23, 2018 at 10:48 PM
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ASEMASTER6371
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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
Oct 23, 2018 at 10:54 PM
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GKTAYLOR619
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It is 14.7.
Oct 23, 2018 at 11:00 PM
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GKTAYLOR619
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Bought a brand new battery; voltage drops to 14.4 and goes back to 14.7.
Oct 23, 2018 at 11:01 PM
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ASEMASTER6371
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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
Oct 23, 2018 at 11:02 PM
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GKTAYLOR619
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14.4 when cold and 14.7 when running.
Oct 23, 2018 at 11:05 PM
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ASEMASTER6371
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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
Oct 23, 2018 at 11:13 PM
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GKTAYLOR619
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Okay.
Oct 23, 2018 at 11:17 PM
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ASEMASTER6371
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Keep me updated on what is happening.

Roy
Oct 23, 2018 at 11:23 PM
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GKTAYLOR619
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Thank you and will do!
Oct 24, 2018 at 5:42 AM
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ASEMASTER6371
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Feel free to ask any follow up questions.

Roy
Oct 24, 2018 at 6:23 AM
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GKTAYLOR619
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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?
Oct 24, 2018 at 10:54 PM
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ASEMASTER6371
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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
Oct 24, 2018 at 11:13 PM
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GKTAYLOR619
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Ok, will do. Thanks
Oct 24, 2018 at 11:43 PM
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ASEMASTER6371
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your welcome

Always glad to help

Roy
Oct 25, 2018 at 1:00 AM
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