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[garbage456]

I got in the car this morning started it and at different times apart, usually around 2 to 5 seconds there is this sort or grinding, scratching, hissing noise (sounds like the noise when you squirt an aerosol can into its lid)
any ideas please?

[tmx]

did it shut up once it warmed up? if so the SAI pump might be at fault

[garbage456]

did it shut up once it warmed up? if so the SAI pump might be at fault

hi no i turned it off straight away, because a had a rover where the cambelt went and cost me £800 to fix, so i took no chances.

thanks for the reponse.

[MutantCav]

as said...probably find the noise is coming from just behind the passengers side corner of your front bumper...SAI (Secondary Air Injuction) pump

[garbage456]

as said...probably find the noise is coming from just behind the passengers side corner of your front bumper...SAI (Secondary Air Injuction) pump

i will go and check now.

[garbage456]

did it shut up once it warmed up? if so the SAI pump might be at fault

hi,
yes it turned off after a very short amount of time about 15 to 20 seconds, completely stopped.

[Pitchfork]

We Traktor drivers get an 'orrible noise every time we start up!!

[garbage456]

so anyone any ideas about a SAI pump where to get from and is it easy to fit?

[hotel21]

There is a multiplug under the nearside/kerside wing.  Simply unplug it to disconnect the SAI pump and thus stop the noise.  It serves no great purpose, other than to allow the cats to get to efficient operating temperature quicker, thereby allowing GM to quote better consumption figures.

If you are happy with using an excess teaspoonfull or so of fuel on startup, save your cash and ignore the pump....  

[TheBoy]

There is a multiplug under the nearside/kerside wing.  Simply unplug it to disconnect the SAI pump and thus stop the noise.  It serves no great purpose, other than to allow the cats to get to efficient operating temperature quicker, thereby allowing GM to quote better consumption figures.

If you are happy with using an excess teaspoonfull or so of fuel on startup, save your cash and ignore the pump....  

Its not fuel, its emissions, by getting cats up to temp faster.

But no harm in disconnecting - later omegas don't have it anyway.

[hotel21]

There is a multiplug under the nearside/kerside wing.  Simply unplug it to disconnect the SAI pump and thus stop the noise.  It serves no great purpose, other than to allow the cats to get to efficient operating temperature quicker, thereby allowing GM to quote better consumption figures.

If you are happy with using an excess teaspoonfull or so of fuel on startup, save your cash and ignore the pump....  

Its not fuel, its emissions, by getting cats up to temp faster.

But no harm in disconnecting - later omegas don't have it anyway.

I understood that if cats were at temp then less fuel was fed in, hence the teaspoonsul of fuel bit?   :-/

[Alex Wood]

Dead easy to remove, three bolts and a couple of connectors. The horns come off with it though so you need to mount them on a convenient bit of metal behind the bumper with a couple of holes in it.

You can also remove the black plastic assembly and rubber pipe and metal pipe and one-way valve in the engine bay, just follow the pipework up from the pump. I plugged up the pipes coming off the manifold with a couple of spark plugs where the metal pipe used to be. Can't tell unless you get your head in there and it makes getting the timing cover off that bit easier!

[garbage456]

thanks all for your help, i will disconnect it whenever i get a chance this year !!