Help...with hissing sound

[OiNK]

Guys,

Need some input from you, I can hear a bit of a hissing sound under the car, it is quite obvious when under, I am unsure if it is the exhaust or maybe fuel being pumped from the tank? Can't find any leaks on the exhaust as far as I can tell but I want to know what the hiss is.

Pretty sure if I am going say 30mph and put it in 5th gear with foot down I can hear a hiss...thoughts?

Video here;

https://www.dropbox.com/s/vd2uod4s2c2w7wl/VIDEO0048.mp4

 

[OiNK]

PS, the deep burbling sound in the video is just the exhaust, sorry the sound quality is not great.

 

[deadmau5]

When you had your exhaust fitted, did they use any exhaust paste or silicone sealant? It could be blowing perhaps.

 

[Foxspeed]

you will hear the fuel pump from that area of the car

but it also sounds like a slight escape of exhaust gas - might be worth double checking the exhaust joins etc

 

[OiNK]

Is that the sound a fuel pump makes then? A bit of a hiss? I have checked all the joints I cannot seem to find any blowing or leaking.

Yes they used an exhaust sealant when fitting my system.

 

[Foxspeed]

Is that the sound a fuel pump makes then? A bit of a hiss? I have checked all the joints I cannot seem to find any blowing or leaking.

Yes they used an exhaust sealant when fitting my system.

a hum...a buzz or a hiss sort of sound

switch the car off and then get someone to start it - you will hear the pump prime the fuel system before the engine fires

just because sealer was used doesnt mean it gas tight - the system will expand/contact with temperatur and could cause a slight blow

 

[OiNK]

Will get a better look at it tomorrow, have to take the diffuser off, maybe it is the joint under that at the back boxes. Why didn't I just leave it alone lol