Fuel pump running when the car is off? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Target70 · 03-24-2014, 11:57 PM

I sit in my car to listen to the radio or read a book while I eat lunch, and on occasion I will hear humming from the dash, and other times I will hear humming from the trunk. I got out today slid under the back of the car and am pretty sure it is the fuel pump running, but the car is turned completely off. I don't even have the key in the ignition. It will run for over a minute, I don't know exactly how long it goes, because I usually get annoyed and I turn the key on to acc+, then back off to make it stop. All I can think is that it is keeping the fuel system pressurized. Anybody have any idea?

Turbo95eg6 · 03-24-2014, 11:58 PM

Normal. Search or read the manual.

P@ul · 03-25-2014, 12:13 AM

It says on for a while, I've noticed just sitting in the car finishing a phone conversation with the car off. *shrugs* nothing wrong.

Sent from my Nexus 5 using Tapatalk

humfrz · 03-25-2014, 12:19 AM

It may be the purge pump you hear running (fuel evaporation leakage check).

Quite normal.

humfrz

Target70 · 03-25-2014, 05:54 AM

Quote:

Originally Posted by Turbo95eg6

Normal. Search or read the manual.

searched before I posted, doesn't show anything related unless it's farther down the list then I looked. I read manual first day I bought the car, I never saw anything about the fuel pump running when the car is not in operation.
I never said it wasn't normal, Just not sure why it was doing it.

humfrz: It may be the purge pump you hear running (fuel evaporation leakage check).

I did not know there was a pump for that, but then again I am used to a carbon canister working off of vacuum lines and solenoids, and only working with the car running. I have no clue how this one is setup.
Thanks.

Shagaliscious · 03-25-2014, 06:37 AM

Quote:

Originally Posted by Target70

searched before I posted, doesn't show anything related unless it's farther down the list then I looked. I read manual first day I bought the car, I never saw anything about the fuel pump running when the car is not in operation.
I never said it wasn't normal, Just not sure why it was doing it.

humfrz: It may be the purge pump you hear running (fuel evaporation leakage check).

I did not know there was a pump for that, but then again I am used to a carbon canister working off of vacuum lines and solenoids, and only working with the car running. I have no clue how this one is setup.
Thanks.

Straight from the manual.

Quote:

Approximately five hours after the engine is turned off, you may hear sound
coming from under the vehicle for several minutes. This is the sound of a fuel
evaporation leakage check and, it does not indicate a malfunction.

cfordart · 03-25-2014, 02:51 PM

It may be the purge pump you hear running (fuel evaporation leakage check).

My car and my wife's Prius were both "talking" to each other in the garage the other night....

AznBRZer · 03-25-2014, 02:52 PM

I'm not sure if anyone's mentioned it yet, but it's the fuel evaporation leakage check.

5hairpins · 03-25-2014, 03:21 PM

Also for those of us who have the starting issue, turning on Accessory gets the pump primed and allows for first time starts. When I just turned the key all the way without waiting at ACC position for a few heartbeats, my car would not reliably start.

humfrz · 03-25-2014, 04:08 PM

Quote:

Originally Posted by cfordart

It may be the purge pump you hear running (fuel evaporation leakage check).

My car and my wife's Prius were both "talking" to each other in the garage the other night....

.....a Prius plus a FR-S would produce a ____________(what)??

humfrz

Target70 · 03-25-2014, 04:20 PM

shagaliscious: Approximately five hours after the engine is turned off, you may hear sound coming from under the vehicle for several minutes. This is the sound of a fuel
evaporation leakage check and, it does not indicate a malfunction.

I appreciate it, I'll have to read it again when I get home to see I can find it.

humfrz · 03-25-2014, 05:01 PM

Quote:

Originally Posted by Target70

..........
I appreciate it, I'll have to read it again when I get home to see I can find it.

It appears on page 14 of my FR-S manual.....

humfrz

mav1178 · 03-25-2014, 06:32 PM

Quote:

Originally Posted by Target70

I appreciate it, I'll have to read it again when I get home to see I can find it.

http://techinfo.subaru.com/proxy/712...316DSTIS_2.pdf

Just go read the PDF version of the manual on Subaru.com... I'm sure there is the same thing on scion.com

-alex

03-24-2014, 11:57 PM	#1
Target70 Senior Member Join Date: Dec 2013 Drives: 2013 Asphalt 6spd Location: Mid GA Posts: 783 Thanks: 265 Thanked 366 Times in 240 Posts Mentioned: 18 Post(s) Tagged: 0 Thread(s)	Fuel pump running when the car is off? I sit in my car to listen to the radio or read a book while I eat lunch, and on occasion I will hear humming from the dash, and other times I will hear humming from the trunk. I got out today slid under the back of the car and am pretty sure it is the fuel pump running, but the car is turned completely off. I don't even have the key in the ignition. It will run for over a minute, I don't know exactly how long it goes, because I usually get annoyed and I turn the key on to acc+, then back off to make it stop. All I can think is that it is keeping the fuel system pressurized. Anybody have any idea?

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03-24-2014, 11:58 PM	#2
Turbo95eg6 Senior Member Join Date: Nov 2013 Drives: 2014 BRZ SWP LTD Location: The 503 Posts: 2,174 Thanks: 331 Thanked 2,266 Times in 858 Posts Mentioned: 18 Post(s) Tagged: 3 Thread(s)	Normal. Search or read the manual.

03-25-2014, 12:13 AM	#3
P@ul Apostle Join Date: Apr 2013 Drives: JesusMobile Location: SoCal Posts: 282 Thanks: 276 Thanked 83 Times in 48 Posts Mentioned: 1 Post(s) Tagged: 2 Thread(s)	It says on for a while, I've noticed just sitting in the car finishing a phone conversation with the car off. shrugs nothing wrong. Sent from my Nexus 5 using Tapatalk

03-25-2014, 12:19 AM	#4
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 30,432 Thanks: 29,826 Thanked 32,845 Times in 16,844 Posts Mentioned: 715 Post(s) Tagged: 2 Thread(s)	It may be the purge pump you hear running (fuel evaporation leakage check). Quite normal. humfrz

03-25-2014, 02:51 PM	#7
cfordart Senior Member Join Date: Feb 2013 Drives: 2014 FR-S Location: Memphis Posts: 183 Thanks: 16 Thanked 91 Times in 49 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	It may be the purge pump you hear running (fuel evaporation leakage check). My car and my wife's Prius were both "talking" to each other in the garage the other night....

03-25-2014, 02:52 PM	#8
AznBRZer Senior Member Join Date: Apr 2013 Drives: 16 CBS WRX Limited Location: Boston Posts: 1,147 Thanks: 947 Thanked 592 Times in 371 Posts Mentioned: 10 Post(s) Tagged: 1 Thread(s)	I'm not sure if anyone's mentioned it yet, but it's the fuel evaporation leakage check.

03-25-2014, 03:21 PM	#9
5hairpins Senior Member Join Date: Mar 2012 Drives: 2013 MT Asphalt FR-S Location: Brownwood TX Posts: 567 Thanks: 84 Thanked 254 Times in 116 Posts Mentioned: 7 Post(s) Tagged: 1 Thread(s)	Also for those of us who have the starting issue, turning on Accessory gets the pump primed and allows for first time starts. When I just turned the key all the way without waiting at ACC position for a few heartbeats, my car would not reliably start.

03-25-2014, 04:20 PM	#11
Target70 Senior Member Join Date: Dec 2013 Drives: 2013 Asphalt 6spd Location: Mid GA Posts: 783 Thanks: 265 Thanked 366 Times in 240 Posts Mentioned: 18 Post(s) Tagged: 0 Thread(s)	shagaliscious: Approximately five hours after the engine is turned off, you may hear sound coming from under the vehicle for several minutes. This is the sound of a fuel evaporation leakage check and, it does not indicate a malfunction. I appreciate it, I'll have to read it again when I get home to see I can find it.

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