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whistling noise in 4th and 5th gear

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Old 10-06-2005, 09:55 PM
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whistling noise in 4th and 5th gear

i am currently running a stage 1 map from the accessport, and i noticed that when im hitting full boost in 4th or 5th gear and get to around 100mph, the boost sound would get 2 times louder. im kinda stumped on determining what this sound exactly is and what it causing it, because i am watching my boost gauge when this happens, and i do not see a drop in pressure. the sound will only happen when i hit full boost in 4th or 5th gear going around 100mph, and it will go away right when i get off the gas, and will only happen again if i give it full throttle and it builds up to 14.7 psi of boost again.

anyone else had this problem before?
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Old 10-06-2005, 09:57 PM
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im not sure if it is an uppipe leak either, because if i recall correctly, if the uppipe is leaking, it should be a whistling sound right? the sound i have coming out of my car is definately not a whistling sound, it just sounds like the boost getting two times louder
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Old 10-06-2005, 10:06 PM
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it must be V-TEC! :banana:
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Old 10-07-2005, 12:56 AM
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Originally Posted by STi-owns-evo
it must be V-TEC! :banana:
I second this... did you accidentally get an oil change @ Honda? They hooked you up man... Yay for VTEC
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Old 10-07-2005, 01:26 PM
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Originally Posted by Boost Addict
I second this... did you accidentally get an oil change @ Honda? They hooked you up man... Yay for VTEC

wow that was quite helpful. what an idiotic reply.






i think calling cobb is the best solution as of right now.
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Old 10-08-2005, 12:03 AM
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bump...lookin for real answers..not dumbasses joking around
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Old 10-08-2005, 05:59 AM
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Origami posted by dynamicprojeKtz
im not sure if it is an uppipe leak either, because if i recall correctly, if the uppipe is leaking, it should be a whistling sound right? the sound i have coming out of my car is definately not a whistling sound, it just sounds like the boost getting two times louder
It's tough trying to troubleshoot noises over the internet.

In your post you say that there is "not a whistling sound", but your thread title reads, "whistling noise...".

'Boost' itself does not make a sound. Do you think that what you hear is more likely the rush of intake air or the sound of exhaust becoming louder?

Please list other mods done to your car.

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Old 10-08-2005, 12:36 PM
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helix uppipe, greddy evo catback, k&n filter, and samco intercooler hoses
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Old 10-08-2005, 06:56 PM
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You might check the IC hoses to make sure a leak hasn't developed. It's only a guess as to why the noise doesn't get louder in the lower gears but in 4th and 5th gear, there is much greater load on the engine.

A common uppipe leak occurs when the engine is cold but goes away (for me, at least) after driving for about ten minutes and things heat up. It's really noticeable as a 'shrieking' noise when the engine gets into any sort of boost in any gear.

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Old 11-02-2005, 06:19 AM
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I still think its vtec... keep us posted and lighten up man, youre still breathing arent ya?


i do hope your problems resolved soon
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Old 11-06-2005, 08:01 PM
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When did this problem start to happen after you had the accessport, after you put in the k and n filter or what. Just trying to eliminate some things.
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