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02-24-2021, 07:56 PM | #1 |
Scooby Newbie
Member#: 500975
Join Date: Apr 2019
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Why do subarus crank so slowly compared to other cars?
Is it a grounding issue? Starter undersized? Battery undersized? Doesn't make sense to me
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02-24-2021, 08:14 PM | #2 |
Scooby Guru
Member#: 50586
Join Date: Dec 2003
Chapter/Region:
BAIC
Location: Chiraq
Vehicle:64 Impala |
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02-25-2021, 03:16 PM | #3 |
Scooby Newbie
Member#: 499784
Join Date: Mar 2019
Vehicle:2017 WRX Crystal White Pearl |
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02-26-2021, 01:07 PM | #4 |
Scooby Newbie
Member#: 518233
Join Date: Aug 2020
Vehicle:2019 WRX |
cranks fine y u being picky dawg
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02-27-2021, 12:00 PM | #5 |
Scooby Specialist
Member#: 182415
Join Date: Jun 2008
Chapter/Region:
Tri-State
Location: New York
Vehicle:1999 RS Aspen White |
Its a tiny little starter on a tiny little motor lol
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02-27-2021, 01:56 PM | #6 |
Scooby Newbie
Member#: 386600
Join Date: Apr 2014
Location: Western Canada
Vehicle:2015 WRX |
The stock battery is really small, only 390 cold cranking amps, 48 amp hour. Mine went bad after 2 and a half years. Subaru replaced it under warranty with a 540 CCA 48Ah battery, which works better and has lasted longer so far. When I replace this one, I'm going to try to get an even larger one.
Subaru uses high pressure, high volume oil pumps in their engines which may make cranking more difficult than other vehicles, especially with cold thick oil. This engine flows more oil at higher pressure than your typical V8 engine. Small batteries charge more slowly, and cold temperatures also reduce charging rates. I have to put a charger on my battery a couple of times per winter to keep the charge up when I'm not driving it enough in cold weather. Check your battery's resting voltage with a multimeter. If it's less much than 12.6V I would put it on a charger. Edit: If you have an Accessport, you can log the battery voltage while starting too. It should dip down to around 7-8 volts for a fraction of a second, then settle to at least 9.5 volts until it fires. If the voltage is lower than this, either the battery either has a poor charge, or will need to be replaced soon. |
02-28-2021, 08:04 AM | #7 |
Scooby Newbie
Member#: 520409
Join Date: Nov 2020
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I never noticed this on my last two Subarus, and both of them went through multiple batteries over their lives - but my most recent used (2016 Impreza bought 11/20) cranked really slow with factory Panasonic. Enough to worry me before a NEPA winter. I replaced it with a NAPA Legend, no more slow cranking.
Mike B |
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