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Old 06-27-2011, 09:36 PM   #1
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question about fuel pump

I have a 2010 Tacoma reg. cab, 4 cylinder, 5 speed. Today, a good hour after I parked it in the garage I could hear a humming noise from the left rear. It sounded like the fuel pump was running. I turned the key on and off again and it stopped. Any ideas out there? Thanks, Jeff
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Old 06-27-2011, 09:57 PM   #2
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next time you hear it,loosen the gas cap and see if it goes away.it maybe venting the pressure from the fuel tank.
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Old 06-28-2011, 06:39 AM   #3
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I've had this happen to me on my 2011. Similar senario, parked in the garage on a warm day. I'm pretty sure it was the fuel pump venting the tank. I loosened the gas cap and a rush of air came out. The pump stopped immediately. I've wanted to look it up on a schematic to verify, just haven't taken the time.
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Old 06-28-2011, 06:47 AM   #4
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That is the EVAP system working, not the fuel pump. It tests the vaccuum of the fuel system, checking for leaks.
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Old 06-29-2011, 09:26 PM   #5
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Thanks for the great tips!
Silvert
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Old 06-29-2011, 09:27 PM   #6
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Quote:
Originally Posted by skytower View Post
That is the EVAP system working, not the fuel pump. It tests the vaccuum of the fuel system, checking for leaks.
X2. It does it after about 7 hours. It even says so in the manual.
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