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G35 Coupe V35 2003 - 07 Discussion about the 1st Generation V35 G35 Coupe

hissing from underbody

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Old 01-29-2005, 12:56 PM
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hissing from underbody
Hey everyone. I just started to notice a "hissing" noise from under my coupe. It is intermittent. "hiss-hiss" then a second or two of nothing, then "hiss hiss". It keeps doing that. Sometimes it isn't there. Anyone else have this issue?
 
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Old 01-29-2005, 01:17 PM
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Yes...I have the same problem when I accelerate...Someone please tell me what it is so I can take it to the dealer and tell them!
 
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Old 01-29-2005, 01:59 PM
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I have that same problem... I really noticed it when I installed my test pipes...
 
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Old 01-29-2005, 02:04 PM
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I have not looked yet but does the G35 have a smog pump or air circulation system on the cat? If it does that might be it. Or it could be the fuel pump.
 
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Old 01-29-2005, 02:40 PM
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Its the FUEL PUMP! I started hearing it to one day and took it to the dealer. Let me just say i left feeling a little stupid!! heh theres nothing to worry about it's completely normal!!
 
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Old 01-29-2005, 02:59 PM
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Originally Posted by Diamond_Coupe
Its the FUEL PUMP! I started hearing it to one day and took it to the dealer. Let me just say i left feeling a little stupid!! heh theres nothing to worry about it's completely normal!!
hmm, really? thanks for the help... i feel alot better now.
 
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Old 01-29-2005, 03:12 PM
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Absolutely normal guys. Iv'e heard it on my previous new cars as well. Your just paying attention to detail because of the "newness" of the car I can't blame ya...
 
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Old 01-29-2005, 05:13 PM
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thanks GIF, you second the fuel pump notion?
 
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Old 01-29-2005, 05:23 PM
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Originally Posted by pointman1
thanks GIF, you second the fuel pump notion?
I am not mechanically inclined to say so, however, from the previous cars I have bought (Brand New), I could hear it most when driving home after traffic or so and just standing idle in my driveway.
 
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Old 01-29-2005, 06:01 PM
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hmm, okay... thanks. this is not my first new car either, and this is the first time i have ever this noise.
 
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Old 01-29-2005, 06:04 PM
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Hummm....I hear that in the summer time when the AC condensation drips on the exhaust......
You sure you don't have a leak in something????
 
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Old 01-29-2005, 06:39 PM
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i have no clue. you know what it sounds like... when you turn the steering wheel all the way to its end left or right... and it makes that noise. very similar sound.
 
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Old 01-29-2005, 07:28 PM
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Originally Posted by pointman1
Hey everyone. I just started to notice a "hissing" noise from under my coupe. It is intermittent. "hiss-hiss" then a second or two of nothing, then "hiss hiss". It keeps doing that. Sometimes it isn't there. Anyone else have this issue?
If it's under the front of the car, it could be condensed water from the a/c dripping on the hot exhaust.

If it's under the rear, it could be the fuel pump altho that's more like a whine than a hiss.

C.
 
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Old 01-30-2005, 12:55 AM
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Originally Posted by gsedanman
If it's under the front of the car, it could be condensed water from the a/c dripping on the hot exhaust.

If it's under the rear, it could be the fuel pump altho that's more like a whine than a hiss.

C.
it sounds like its from right under the front seats.
 
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Old 01-30-2005, 02:14 AM
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ITS THE FUEL PUMP DUDE!! Its hard to describe, hiss, whine, either way its normal nothings wrong with your car.
 
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