4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

installed plenum w/factory TB

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Old 06-20-2007, 12:02 AM
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99gtstang
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Default installed plenum w/factory TB

my tb is in the mail but i put the plenum on got new gaskets and i am getting a swoosh effect when i give it gas. While driving it sounds like a whistle really quiet is that normal? or is it a leak
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Old 06-20-2007, 12:14 AM
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mvr
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Default RE: installed plenum w/factory TB

mine makes a whoosh sound, kinda a "khhhhhh" sound. i can only hear it under light light revs, motor and exhaust cover it up most the time.
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Old 06-20-2007, 12:30 AM
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99gtstang
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Default RE: installed plenum w/factory TB

ORIGINAL: mvr

mine makes a whoosh sound, kinda a "khhhhhh" sound. i can only hear it under light light revs, motor and exhaust cover it up most the time.
yea it's louder under revs.. but other then that i can barely hear it..............

some odd reason i can feel a slight difference around the 3 adn 4k RPM range
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