Wierd hiss noise 06 Sedan

[tel7726]

Hey all from the Atlanta area. New poster – new owner 2006 G35 Sedan. I’ve been reading all the past posts and find this board superb. I’m no major wrench, but am still enthusiastic. My last build projects were two 1970 GTO’s (no neither was a “Judge”) but those were in the mid 1980s. I’m a bit old for serious mods, but I want to do right by this sweet ride. I have a question about the only noise I hear in this car – it happens when I first start up, back out of the garage, and start forward up the drive. After about 10 feet going forward I hear a hiss (about one-tenth the sound of an 18 wheeler’s air brake system purging) that is best described as a quiet “spurt” of something. Any body got any thoughts they would share on what this is?On another note, I am looking to add a spoiler, and would welcome suggestions as to where to buy, and degree of difficulty to install perfectly. This little rocket deserves nothing less. Thanks, and happy to be here. sam

[tollboothwilley]

Any idea where the sound is coming from?

Do you hear it with windows up/down?

[adren77]

I have a question about the only noise I hear in this car – it happens when I first start up, back out of the garage, and start forward up the drive. After about 10 feet going forward I hear a hiss (about one-tenth the sound of an 18 wheeler’s air brake system purging) that is best described as a quiet “spurt” of something. Any body got any thoughts they would share on what this is?

This is normal. The car is performing ABS test. It happens on all G35's.

[tel7726]

Man, thank you! ABS check sounds just like what I am hearing. sam