Is this normal? V8V

[Windymiller]

Refitted the standard exhaust to my 08 Vantage Roadster, and when I turn the ignition on, it keeps making a strange noise.
The exhaust valve seems to be working as it's ridiculously quiet with fuse 22 in, and nice and noisy with it removed.

I'm guessing this is the actuator?

https://www.youtube.com/watch?v=xXv72-SyO1M

[Ikebaddog]

That ain't normal!, if it is the actuator, i would say it is fked!

[Windymiller]

Also meant to say that when I pull fuse 22 the noise stops, and fuse 22 is for the solenoid, so it must be the solenoid.

Wondering if my local garage connected the pipes up wrong maybe?

[V12Vanquish]

It sounds like a vacuum leak to me, a hose must be leaking / split somewhere.
If your vacuum pump is running all the time due to a vacuum leak it will burn out. It's not designed to run all the time, only to close the valves when required by the ecu.

[Windymiller]

Ah, thanks for the advice! Will check tomorrow.

[justin220]

That is the sound of the exhaust valves closing.

I've fitted a remote fuse 22 switch, and when I get into the car, I can press 'close' it makes that noise, and the car will be quieter when I fire it up!

[Windymiller]

The thing I don't get though is that if there's an air leak, surely the valves wouldn't close when the fuse is in? They definitely are though as the car is very quiet with the fuse in, and noisey with it out. Time to investigate...

[V12Vanquish]

If you read my original post again. It's vacuum not air pressure that controls the valves. If you have a vacuum leak in the circuit they will most likely still work, but the vacuum pump will be working overtime to compensate for the leak. A small split or bad joint in one of the rubber pipes will be enough to make it run constantly. It's not designed for this heavy duty work and it will burn out if just left. I do have some experience working with vacuum pumps on manufacturing machinery.

Edited by V12Vanquish on Sunday 30th March 11:49

[Windymiller]

Ah, the joys of reading my phone whilst lying under the car! Thanks for the advice - looks like it was just a poor connection to one of the t-pieces.