weird noise
12-13-2008, 12:26 AM
#1
Safety Car
Thread Starter
weird noise
I'm trying to locate a weird noise (sounds like a rattle) which only happens between 2300-2500rpms, while rpms are maintained in that range. If I let off, it goes away, if I lean into it (accelerate) it goes away. I can only reproduce it in the first 3 gears (so far), and it seems to be softer as the engine warms up.
Does not make that sound if I power thru the gears, nor at any other rpms.
HP tuner logs do not show the knock sensor picking anything (like if it was related to internals).
The only think I can relate it too when it comes to "sounds and weird noise" would be a wrist pin going out on an engine (early stage).
I'm also not able to reproduce that weird sound in neutral on the driveway. I have to be moving.
looking for ideas where to check for something loose, because I honestly have no clue where to start!
Does not make that sound if I power thru the gears, nor at any other rpms.
HP tuner logs do not show the knock sensor picking anything (like if it was related to internals).
The only think I can relate it too when it comes to "sounds and weird noise" would be a wrist pin going out on an engine (early stage).
I'm also not able to reproduce that weird sound in neutral on the driveway. I have to be moving.
looking for ideas where to check for something loose, because I honestly have no clue where to start!
12-13-2008, 06:15 AM
#2
Instructor
Member Since: May 2007
Posts: 174
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I'm trying to locate a weird noise (sounds like a rattle) which only happens between 2300-2500rpms, while rpms are maintained in that range. If I let off, it goes away, if I lean into it (accelerate) it goes away. I can only reproduce it in the first 3 gears (so far), and it seems to be softer as the engine warms up.
Does not make that sound if I power thru the gears, nor at any other rpms.
HP tuner logs do not show the knock sensor picking anything (like if it was related to internals).
The only think I can relate it too when it comes to "sounds and weird noise" would be a wrist pin going out on an engine (early stage).
I'm also not able to reproduce that weird sound in neutral on the driveway. I have to be moving.
looking for ideas where to check for something loose, because I honestly have no clue where to start!
Does not make that sound if I power thru the gears, nor at any other rpms.
HP tuner logs do not show the knock sensor picking anything (like if it was related to internals).
The only think I can relate it too when it comes to "sounds and weird noise" would be a wrist pin going out on an engine (early stage).
I'm also not able to reproduce that weird sound in neutral on the driveway. I have to be moving.
looking for ideas where to check for something loose, because I honestly have no clue where to start!
Could be your upper hatch seal. Mine came loose and bunched up and when closed it caused a very low sucking noise in inside the cabin. About 3-4 inches of it had come out of the groove. Very difficult to see but easy to fix. Drove me nuts for weeks. Couldn't seeit from inside the car and also from the outside due to tinted window.
12-13-2008, 08:03 AM
#3
Safety Car
Thread Starter
Could be your upper hatch seal. Mine came loose and bunched up and when closed it caused a very low sucking noise in inside the cabin. About 3-4 inches of it had come out of the groove. Very difficult to see but easy to fix. Drove me nuts for weeks. Couldn't seeit from inside the car and also from the outside due to tinted window.
12-13-2008, 12:18 PM
#4
Safety Car
Thread Starter
so I went under the car to check the exht, shields and what not...couldn't find anything loose...I confirmed that the sound is not there while reving and holding the rpms while parked on the driveway...