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07-12-2017, 08:30 PM | #1 |
Drives: 2008 toyota yaris Join Date: Jun 2017
Location: bay area
Posts: 4
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Help Diagnose Sound Please!
Hi all!
I've got a 2008 with 137k on her. I've been experiencing a high pitched electrical sounding sound that directly relates to when I push the gas pedal to accelerate. When I let go, the sound lets off but decelerates with the car if that makes sense. I can't make the sound occur with the car in neutral or park so its really hard to pinpoint. I tried listening inside my alternator and i can hear a similar electrical noise but very quiet. I'm not too sure what an alternator is supposed to sound like. It's not a super alarming sound. It sounds like a supercharged engine! Runs and drives wonderfully as always. I looked under the hood and noticed coolant leak from my water pump. I was all excited and thought I found the cure to the noise. After new water pump installation today, the noise continued. :[ Is it my alternator? Is it possible its the fan? Any input and help would be greatly appreciated! Thanks! |
07-12-2017, 11:23 PM | #2 |
Drives: Twin-charged rotary V8 w/nos Join Date: Nov 2011
Location: CALIFORNIA
Posts: 300
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Sounds like a grounding issue. Do you have your radio on or anything plugged into your auxiliary during these times?
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07-12-2017, 11:50 PM | #3 |
Drives: '14 GT86, '08 Vitz Join Date: Dec 2006
Location: Central Valley, CA
Posts: 9,873
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If you can somehow record the sound, that would help.
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07-13-2017, 07:56 AM | #4 |
Drives: 2007 2-door hatchback Join Date: Jul 2016
Location: USAnotCA
Posts: 750
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"Electrical Sound"
electrical sounds--spark plug discharge snap, thunder, area buzz during lightning storm, arc welder, transformer hum, various undesired noises coming out of the TV or stereo, ?
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07-13-2017, 09:38 AM | #5 |
Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012
Location: Caledonia Ont.
Posts: 2,938
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check your electrical silencer which is a connector from your main engine harness that essentially attaches to a rubber block that is molded to a metal bracket that attached to your block.
If that has come disconnected then it could be the source of your issue as that is what it is designed to fix.
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No one ever wants to give a Yaris the point by... |
07-13-2017, 01:14 PM | #6 |
Drives: 2008 toyota yaris Join Date: Jun 2017
Location: bay area
Posts: 4
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I tried recording a sound but its so faint and high pitched, my phone won't pick it up. The more I drive, the louder it gets. I'll try and get a good recording tmrw.
I tried unplugging my aux cord as its always plugged in and it didn't help anything. Can you be a little more specific on where to find that electrical silencer on the engine block? Left, right, bottom, top? Thanks! |
07-13-2017, 02:03 PM | #7 | ||
それを吸ってください
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Quote:
Quote:
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07-13-2017, 02:40 PM | #8 | |
Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012
Location: Caledonia Ont.
Posts: 2,938
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Quote:
On my signature picture of my 2zr engine it is located on the right side of the valve cover and just to the right of the black hose that comes off of the cold air intake. It is like a ground but the metal part from the bracket that mounts onto the engine runs into a rubber dampener and then that goes to a connector to attach it to the engine harness
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No one ever wants to give a Yaris the point by... |
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07-13-2017, 02:50 PM | #9 | |
Drives: 2008 toyota yaris Join Date: Jun 2017
Location: bay area
Posts: 4
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Quote:
No aftermarket stereo. Everything stock on the car. |
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07-13-2017, 05:45 PM | #10 |
Drives: 2011 Yaris Join Date: Feb 2009
Location: USA
Posts: 36
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Could be the water pump- look for evidence of coolant.
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07-13-2017, 06:36 PM | #11 |
Drives: 2008 toyota yaris Join Date: Jun 2017
Location: bay area
Posts: 4
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Thats what i thought it was but i just replaced it! there was a coolant leak but all is well now with a new gasket and pump.
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