GX - 2nd Gen (2010-2023) Discussion topics related to the 2010 + GX460 models

Hard or long start

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Old Sep 5, 2023 | 05:35 PM
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Default Hard or long start

Hello every1 2011 gx , so this week i realised the car takes long to start sometimes here is my explanation.. Normally i hit the start button then click and starts . Now sometimes it does like 6–7 clicking noises then starts. Like notmally it takes 3 secondes and boom now more like 7 sec . Could it be starter or battery. Sorry for the wisrd explanation. If starter what brand do u suggest as new one here at dealer is 1k … makes no sense
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Old Sep 5, 2023 | 08:16 PM
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sad to say i know next to nothing about mechanicals, but what you describe sounds like action I was beginning to experience - knowing my battery had 6 years on it but wanting to get every last start out of it. when I finally replaced the battery, starting returned to normal instant action.

how old is the battery? have you tried charging it?

if you replace the battery, personally, I highly recommend the Lexus OEM that is distributed by Interstate. As big a ripoff as Lexus is on the price of parts in general, for whatever weird reason, the battery is a lot cheaper than you even can buy it direct from Interstate, and has a better warranty. or, at least that was my experience a couple months ago.
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Old Sep 5, 2023 | 08:34 PM
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thanks bud battery was replaced at lexus dealer 3 years ago but tomorrow going in i have a feeling it is battery
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Old Sep 6, 2023 | 07:39 AM
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Forget the dealership ... get an Interstate MegaTron battery. Best warranty in the industry.
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Old Sep 6, 2023 | 08:08 AM
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Done it was the battery thank u all battery had cell issues but was still under their warranty
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Old Sep 6, 2023 | 08:12 AM
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Hard on the starter motor ... undervoltage increases the current draw ... that stresses components ... leading to premature failure if continued for any meaningful period of time. I always replace my battery when approaching the 5-year timeframe ... guaranteed degradation ... all about the chemistry.
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Old Sep 6, 2023 | 08:37 AM
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the thing is battery was only 3 years old and i always replace every 4 no matter what
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Old Sep 6, 2023 | 01:46 PM
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The OEM battery ... typically Panasonic ... seems to not last that long as reported on this and 4-Runner forums... and as I have experienced as well.
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Old Sep 6, 2023 | 07:17 PM
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Originally Posted by ASE
Hard on the starter motor ... undervoltage increases the current draw ... that stresses components ... leading to premature failure if continued for any meaningful period of time. I always replace my battery when approaching the 5-year timeframe ... guaranteed degradation ... all about the chemistry.
How does a lower voltage on a DC starter motor increase the current draw? The inrush exists whether going from 0 to 14 or from 0 to 10 but I don't think inrush is even in scope of the comment.
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Old Sep 7, 2023 | 07:50 AM
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P (Watts) = I (Amps) * V (Volts). All devices will pull their required power ... so if the Volts are low(er) the Current (Amps) will be high(er) to meet the Power requirement.

This higher current stresses components ... which is why I have (changing the subject) an APC power conditioner on all of my expensive home electronics .... "Brown Power" kills electronics.

When doing custom wiring on a vehicle, I always assume 10-volts ... to upsize the wire gauge in the event of under-voltage.

Last edited by ASE; Sep 7, 2023 at 08:13 AM.
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Old Sep 7, 2023 | 02:53 PM
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Originally Posted by ASE
P (Watts) = I (Amps) * V (Volts). All devices will pull their required power ... so if the Volts are low(er) the Current (Amps) will be high(er) to meet the Power requirement.

This higher current stresses components ... which is why I have (changing the subject) an APC power conditioner on all of my expensive home electronics .... "Brown Power" kills electronics.

When doing custom wiring on a vehicle, I always assume 10-volts ... to upsize the wire gauge in the event of under-voltage.
Ah I see the issue. The starter motor does not pull any required power and it is not a constant power device. The voltage will cause the current. Because it is not constant power you cant use that equation in that way. You should use E=I*R. Ignoring dynamic states, this then becomes equal to a resistive load, meaning the constant R can be eliminated for trend identification, and you have E is directly proportional to I. This shows that a lower voltage draws a lower current.
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