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Old 08-04-2012, 06:52 PM   #1 (permalink)
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Default Loud engine noise

Just during passing or accelerating fast. Sounds really heavy and more depth to the sound. What could this be? 2008 Forester 73000 miles. Runs great.
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Old 08-04-2012, 07:51 PM   #2 (permalink)
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Default Uhm...

High RPM=louder exhaust???
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Old 08-04-2012, 09:27 PM   #3 (permalink)
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A shot in the dark here... did you service your air intake filter recently? if so, it's possible that the air box wasn't sealed completely shut afterwards, and that can cause a resonating sound at higher RPMs.
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Old 08-04-2012, 11:30 PM   #4 (permalink)
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amen to above.. IF you have the air box to the rear of the engine compartment, grab it and see if the bottom is loose. it has tabs that have to be locked in,
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Old 08-05-2012, 06:15 AM   #5 (permalink)
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Is this the thing with the big hose type thing attached or the thing you access within the glove box. I'm not too engine savvy.
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Old 08-05-2012, 07:01 AM   #6 (permalink)
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Default Guessing you don't open your hood much...

If you do...

On the left side(as you are looking at it, not as if you were in the car) you see this big plastic box. The biggest plastic box under the hood. That is the air filter.

Did you recently get an oil change and purchase an air filter?

This "glove box tube thing" you allude to is the cabin filter, totally different thing...and if that is what is causing this, god help us all...(as in a cabin filter doing this is pretty much impossible)
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