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08-07-2009, 06:24 PM | #1 |
Scooby Specialist
Member#: 188424
Join Date: Sep 2008
Chapter/Region:
Tri-State
Location: Under your car
Vehicle:2012 LS6 FD RX7, Evo |
Weird hissing noise coming from left side of the engine on WOT
so i noticed this sssssssssssssssss noise coming out of the engine while im driving. like air is leaking or something. it is RPM dependent. when i am WOT on highway, it pulses sometimes. like the gasket is going up and down hitting the metal.
so i went under the car, checked all the gaskets. i see no leak on the headers, trackpipe, or the exhaust. no residue. nothing. all the lines are connected. what could this air leaking like sound be? any comments, suggestions would be appreciated thanks
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08-08-2009, 01:28 PM | #2 |
Scooby Specialist
Member#: 188424
Join Date: Sep 2008
Chapter/Region:
Tri-State
Location: Under your car
Vehicle:2012 LS6 FD RX7, Evo |
bumpy
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08-08-2009, 02:28 PM | #3 |
Scooby Specialist
Member#: 202804
Join Date: Feb 2009
Chapter/Region:
MWSOC
Location: Durham, NC
Vehicle:2002 PSM Sedan The 2.0L that could |
i would say check for normal boost psi, but you have a 2.5 rs. Can you hear the hissing @ idle or it's just at WOT?
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08-08-2009, 04:20 PM | #4 |
Scooby Guru
Member#: 53558
Join Date: Jan 2004
Chapter/Region:
NWIC
Location: Deadford, OR
Vehicle:2005 Baja Turbo White/Silver/Black 3tone |
lol First response that came to mind was 'it's the turbo?', then I realized it was an RS as well.
Is your intake properly together? If there are any tears or it has come apart, that could make that sound you are describing. Your engine would also be louder. |
08-08-2009, 09:21 PM | #5 | |
Scooby Specialist
Member#: 188424
Join Date: Sep 2008
Chapter/Region:
Tri-State
Location: Under your car
Vehicle:2012 LS6 FD RX7, Evo |
Quote:
i hear the noise at all RPM's especially at WOT. it defenitely sounds like air leaking and sometimes it pulses like the flange is vibrating.. im really not sure what else to check right now.... |
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08-08-2009, 09:22 PM | #6 |
Scooby Specialist
Member#: 188424
Join Date: Sep 2008
Chapter/Region:
Tri-State
Location: Under your car
Vehicle:2012 LS6 FD RX7, Evo |
and also, its comign from left side of the engine (from sitting in the car), which is opposite side from where the intake is...
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08-08-2009, 09:35 PM | #7 |
Scooby Guru
Member#: 53558
Join Date: Jan 2004
Chapter/Region:
NWIC
Location: Deadford, OR
Vehicle:2005 Baja Turbo White/Silver/Black 3tone |
Get some carb cleaner. With the car warmed up and idling, start spraying it on your intake manifold where it bolts to the heads. If it dies, you've got a leaking gasket. Easy way to check for intake leaks.
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08-10-2009, 12:24 PM | #8 |
Scooby Specialist
Member#: 188424
Join Date: Sep 2008
Chapter/Region:
Tri-State
Location: Under your car
Vehicle:2012 LS6 FD RX7, Evo |
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