Abour 3 or 4 times now when I have turned off my engine usualy after about a 25 mile drive, I got a loud hisss but like a BOV coming from the back of the car.

 

Is that right? Is it meant to do that?

Is my car starting to turn into a bus?

 

 

Stuart

Fuel pump?

Well that is what I thought. Cos I can hear it a little when I turn the ignition on and I hear the same sound when I turn the engine off, but why has it hissed a few times?

 

Is it on its way out?

Dunno wheter a turbo timer has got owt to do with it if i have my turbo timer off and use the key to turn of engine i dont get it, but when the tubo timer is on after its counted down it cuts the engine and you get a noise from the fuel pump which sounds like a little electic motor spinning for about 2 seconds.

 

I thought this was normal.

No. No turbo timer on it.

Next time it does it, try opening the fuel filler - if you don't get the usual hiss, then I'd guess it's the filler cap going dodgy, and sometimes venting the pressure when it's not meant to...