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Author Topic: Compressor noise from CrossTrek  (Read 7474 times)

Offline Sir Osis of Liver

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Compressor noise from CrossTrek
« on: September 28, 2018, 03:19:53 pm »

Lady O said that the CrossTrek will periodically make a noise like a small tire inflation compressor when it's just sitting there with the engine off and key removed.

She called the Subaru dealer and they said it was a normal self test that ran every so many hours to check the fuel system or tank, she couldn't remember exactly.

I can't remember hearing it do that before, and I don't remember anyone mentioning a test like that.

Anyone able to expand on this?

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Offline Fobroader

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Re: Compressor noise from CrossTrek
« Reply #1 on: September 28, 2018, 03:28:43 pm »
Does it have self leveling suspension or something?? Is it keyless start and is she forgetting to shut it all the way off??
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Offline HeliDriver

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Re: Compressor noise from CrossTrek
« Reply #2 on: September 28, 2018, 03:31:14 pm »
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Offline Weels

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Re: Compressor noise from CrossTrek
« Reply #3 on: September 28, 2018, 03:39:05 pm »
Quote from: HeliDriver on September 28, 2018, 03:31:14 pm
Evap system self test?

That's probably it.  Our Crosstrek did the same
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Offline Sir Osis of Liver

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Re: Compressor noise from CrossTrek
« Reply #4 on: September 28, 2018, 03:42:46 pm »
^ Certainly sounds like the explanation. She sent me a video clip of the sound. It does sound like a tiny compressor running.

I can't remember ever hearing it. Maybe the schedule changes as it gets older. It's rolled over 100k. No unscheduled service, but a couple of recalls.

I knew someone would have the answer. Thanks. :thumbup:
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Offline dirtyjeffer

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Re: Compressor noise from CrossTrek
« Reply #5 on: September 28, 2018, 04:31:14 pm »
yea, evap makes sense...i was thinking perhaps something with the fuel pump (i think that car is DI, right?)...just keeping the fuel lines primed with plenty of PSI or something.
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Offline KD

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Re: Compressor noise from CrossTrek
« Reply #6 on: September 28, 2018, 05:09:22 pm »
^^ Yep, evap.  Our Lexus does this.  I first noticed it when i was working in the garage one night and didn't know what it was until i read through the manual.  Mine sounds like a little whirring motor,
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Offline Great_Big_Abyss

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Re: Compressor noise from CrossTrek
« Reply #7 on: October 03, 2018, 03:33:17 pm »
I'm a bit late on this but,  it is definitely the evap system test.  Basically, what the computer is doing is running a little compressor that pressurizes the fuel tank with air.  It records that pressure, and then a little while later, records the pressure again.  If the pressure has dropped since it ran the compressor, it knows that there is an evap leak somewhere, and will throw up a CEL. 

This is how the computer knows that you 'forgot' to tighten your gas gap when filling. 
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Offline Blueprint

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Re: Compressor noise from CrossTrek
« Reply #8 on: January 10, 2020, 10:22:25 am »
So neighbourette just texted me... Her new current-gen Crosstrek (2018 or 2019, low km with stick) is slated for an engine rebuild due to excessive oil consumption. Geez...
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Offline Ex-airbalancer

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Re: Compressor noise from CrossTrek
« Reply #9 on: January 10, 2020, 10:54:22 am »
Quote from: Blueprint on January 10, 2020, 10:22:25 am
So neighbourette just texted me... Her new current-gen Crosstrek (2018 or 2019, low km with stick) is slated for an engine rebuild due to excessive oil consumption. Geez...
Not surprising
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Offline Great_Big_Abyss

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Re: Compressor noise from CrossTrek
« Reply #10 on: January 10, 2020, 11:29:54 am »
Quote from: Blueprint on January 10, 2020, 10:22:25 am
So neighbourette just texted me... Her new current-gen Crosstrek (2018 or 2019, low km with stick) is slated for an engine rebuild due to excessive oil consumption. Geez...

But, Subaru doesn't have an oil consumption problem...  ::)
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Offline sailor723

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Re: Compressor noise from CrossTrek
« Reply #11 on: January 10, 2020, 11:43:43 am »
Quote from: Great_Big_Abyss on January 10, 2020, 11:29:54 am
Quote from: Blueprint on January 10, 2020, 10:22:25 am
So neighbourette just texted me... Her new current-gen Crosstrek (2018 or 2019, low km with stick) is slated for an engine rebuild due to excessive oil consumption. Geez...

But, Subaru doesn't have an oil consumption problem...  ::)

............nor have they ever had head gasket issues.  ::)
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Offline Weels

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Re: Compressor noise from CrossTrek
« Reply #12 on: January 10, 2020, 12:40:24 pm »
Did i ever talk about how much i hated the one we had?   :P
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Offline Great_Big_Abyss

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Re: Compressor noise from CrossTrek
« Reply #13 on: January 10, 2020, 01:47:40 pm »
Quote from: Weels on January 10, 2020, 12:40:24 pm
Did i ever talk about how much i hated the one we had?   :P

What did you not like about it? 
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Offline Slow_lane

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Re: Compressor noise from CrossTrek
« Reply #14 on: February 28, 2022, 11:08:45 am »
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