freestylerx
Member
Registered: 27th Mar 06
User status: Offline
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Hi,
Every morning (or cold start) I get a humming noise, that lasts just under 2 minutes then it stops. That's it.
Under the bonnet, I see it's coming from this small black box/thing, that has a pipe going to it, leading from the exhaust manifold.
If the pipe went to the inlet manifold or near there, then It would more make sence.
Was wondering because, I have a Janspeed exhaust manifold on it's way and was not sure if that sheild covering the standard one had to come off (as it's holding the pipe, that leads to this part)
Anyway here it is:
1. 
2. 
3. 
Thanks
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luke85
Member
Registered: 26th Nov 07
Location: Chesterfield
User status: Offline
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Thats the secondary air injection setup, sounds kinda like a hoover. Its meant to do that, its to warm the CAT up quicker.
If your fitting a new manifold most people remove the secondary air injection system anyway and have the hole in the exhaust welded up
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freestylerx
Member
Registered: 27th Mar 06
User status: Offline
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Ah, ok.
So what if I wanted to keep it on. Does it (cause I can't really see) come directly from the exhaust manifold, if so, will my exhaust have the hole in?
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luke85
Member
Registered: 26th Nov 07
Location: Chesterfield
User status: Offline
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My janspeed exhaust had the holethere but it wasnt threaded so it was easier to weld it up. you should have one big hole and one smaller one threaded next to it when you get the new manifold then you can swap it all over
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freestylerx
Member
Registered: 27th Mar 06
User status: Offline
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Nice one, Thanks alot, means I don't have remove anything 
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Gareth F
Member
Registered: 16th Jan 08
Location: Location Location
User status: Offline
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The one on my tigra didnt work so riped it all out and made a blanking cap from aluminium plate and just bolted it on with a gasket, job done 
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DAZ1985
Member
Registered: 3rd Sep 06
Location: Scholar Green, Cheshire
User status: Offline
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Was going ask this question myself, looks a mess so im just going rid it now i know what it is
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luke85
Member
Registered: 26th Nov 07
Location: Chesterfield
User status: Offline
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You can unplug the air pump with no EM light coming on but there is a small solenoid valve that sits in the small pipe going to the valve. You can take all the pipes off but leave the little valve plugged in
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