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10-06-2020, 09:47 AM
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#1 |
 Drives: 2010 Camaro LLT V6, 2018 Silverado Join Date: Sep 2020
Location: El Paso
Posts: 22
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Crank Battery Voltage?
Hey everyone,
quick question, my battery reads 12.3v in the morning after an overnight shutoff. When I crank the car in the morning the voltage at the battery terminals drops to around 9.8 volts momentarily until the alternator kicks in. my question is this normal behavior? I have verified this with a multimeter and also an OBD II scanner app with graphing capabilities. I have gotten the charging system tested as good, sanded, and retorqued all the battery terminals including the starter connections. 
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10-06-2020, 01:52 PM
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#2 |
  Drives: 2015 Z/22 Join Date: Aug 2015
Location: Ontario, Canada
Posts: 931
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A quick Google search showed that a battery typically drops to 9 - 10 volts after starting the engine. Makes sense since it's pulling a few hundred amps. 14V is typical while driving.
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Overkill/Self Tuned; Mace Camshafts; K&N Typhoon Cold Air Intake; Ported 80mm Throttle Body/Intake Manifolds/Manifold Spacer; Solo Performance High-Flow Cats, Cat-back Exhaust; Vitesse Motorsports Throttle Controller; Elite Engineering E2 Catch Can; BC Racing BR Coilovers; JPSS Delrin Radius Rod Bushing Inserts, Sway Bars; Pegasus Aluminum Rear Cradle Bushings, Camber/Caster Plates; Z/28 Toe Links, Trailing Arms, Upper Control Arm Bushings, Rear Shock Mounts
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10-06-2020, 08:38 PM
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#3 | |
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Drives: 2010 Camaro LLT V6, 2018 Silverado Join Date: Sep 2020
Location: El Paso
Posts: 22
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