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[harpersimon]

Do these all make a sound like a small air compressor when started? goes away after 30 or so seconds..

[tunnie]

secondary air injection, its not needed, just unplug it or the fuse for it 

[harpersimon]

see.. lost me straight away there.. :-) being a newbie.
Secondary Air injection.. and not needed - where would I 'unplug it' - I don't know what it is making the noise LOL before I go unplugging things. so they all do it then - its not about to blow up

[tunnie]

passenger side of the front bumper, can't miss it. I forget which fuse to pull which is the easier way, sure someone can confirm which one shortly 

[harpersimon]

can I ask what its doing/there for if not needed?.. the noise seems to come from the Engine bay, not the bumper.. are we talking about the same thing?

[tunnie]

basically fresh air is injected into exhaust gasses to make sure there is a 'fuller' burn, and its used when cold. As its running rich on start up, helps burn off more, and reduce emissions when cold.

As MOT emissions are done when hot, its not needed 

[Andy B]

If your noise is from the passenger side, then it's the SAI as suggested. I think it's more likely to be a noise from the driver's side front wing/bumper where the compressor for the Elite's self levelling suspension lives. If so, then it's perfectly normal     

[Abiton]

If it's a tappy sort of noise, it could be tappets ( ), in which case an oil change may help reduce the noise.

If it's more of a 'Hoover' type noise, it could well be the SAI pump getting tired/sickly.  Stick your head under the front bumper just in front of the passenger-side wheel while someone else starts it (make sure it's got handbrake on and not in gear...).  If that's where the noise is then that's the SAI pump making it.

Never had any trouble with ours so can't advise on disabling it.  It's 'only' there to reduce cold-start emissions and to heat up the cats more rapidly, neither function is crucial.

[harpersimon]

tell you what, you lads all know your stuff.. been on some forums in my time and some are just full of teenagers driving to fast  - this one has some great advice from knowledgable people
I'll stick my head under the bonnet and see if I can locate which side it comes from on start up..

[harpersimon]

tell you what, you lads all know your stuff.. been on some forums in my time and some are just full of teenagers driving to fast  - this one has some great advice from knowledgable people
I'll stick my head under the bonnet and see if I can locate which side it comes from on start up..

Not tappets.. more hoover / compressor sort of thing.. but as I said stops after about 30 secs.. maybe less if I haven't turned if off long ago.

[tunnie]

also watch the back of the car, if its Self Levelling pump the back end of the car will either rise up or lower

[eliteomegaman]

Have the same noise myself & its DEFO the sai as pointed out.

It goes after 30 secs & if you put your ear to the front passenger side tyre u will hear it - honest!

I'd like to know which fuse is the one for it so i can pull it out if that's possible?

[bigtow]

also watch the back of the car, if its Self Levelling pump the back end of the car will either rise up or lower

if it does turn out to be compressor for suspention i would want to find out where it is leaking air from as mine doesnt pump itself up evey time i start if from cold ?

[harpersimon]

Have the same noise myself & its DEFO the sai as pointed out.

It goes after 30 secs & if you put your ear to the front passenger side tyre u will hear it - honest!

I'd like to know which fuse is the one for it so i can pull it out if that's possible?

I'll put my ear that side tomorrow then. Just sounds like its coming from the engine bay but then I haven't been stood infront listening to the car when I start it!

[Omegafantasy]

On my 95 Omega it's the rear pair of fuses in the engine bay box, a 50 amp in my case. Can't remember what number it was.