Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: v6coop on 31 December 2008, 09:21:12

Title: Noise like a jet engine on cold start
Post by: v6coop on 31 December 2008, 09:21:12

New one on me. The car has started making a whining noise on cold start which goes away after a minute or so. Not tried to locate it precisely yet but seems to be from the front of the engine bay. Is this likely to be the air injection pump? If so, any way of confirming this and any advice on a cure please. Can it be repaired or will it need to be changed. Finally any idea of cost please?

Title: Re: Noise like a jet engine on cold start
Post by: tunnie on 31 December 2008, 10:04:35

sounds like secondary air injection, its not needed, just unplug it!  :y

Title: Re: Noise like a jet engine on cold start
Post by: v6coop on 31 December 2008, 10:54:53

Thanks Tunnie. Will give it a try.

Title: Re: Noise like a jet engine on cold start
Post by: MarkG on 31 December 2008, 12:26:07

It's to help with emissions on cold engine I think which is why it switches off after a few mins. Mine is really noisy too. Nothing to worry about. I think I read on here some time ago it is due to the pump body leaking. I seem to a remember a 'how to repair it guide' somewhere. Anyone remember?

Title: Re: Noise like a jet engine on cold start
Post by: Ian_D on 31 December 2008, 13:00:08

I will be the air injection pump.

It will either be leaking like above, or the bearings will be shot - and thus the horried noise!

Unplug that, and then unplug the vac pipe to the air injection valve (and cap the end) to stop it opening!  :y

Title: Re: Noise like a jet engine on cold start
Post by: Abiton on 31 December 2008, 17:30:33

Quote

... I think I read on here some time ago it is due to the pump body leaking. I seem to a remember a 'how to repair it guide' somewhere. Anyone remember?

Aye, I found this on another forum:

http://uk-mkivs.net/forums/p/141240/940861.aspx#940861

Not sure if the SAI pump is the same, or similar on a miggy, but if so I wouldn't be surprised if the same failure is going on.

  :)
Pete

Title: Re: Noise like a jet engine on cold start
Post by: JamesV6CDX on 31 December 2008, 17:33:40

Definately SAI. My previous Elite started doing it.

Best course of action is just to unplug it - there's no harm in that at all. It's more of an annoyance, than a fault :y

Title: Re: Noise like a jet engine on cold start
Post by: HGV mechanic on 31 December 2008, 18:36:52

Quote

Definately SAI. My previous Elite started doing it.

Best course of action is just to unplug it - there's no harm in that at all. It's more of an annoyance, than a fault :y

call me sad but i like it, :-[

Title: Re: Noise like a jet engine on cold start
Post by: Ian_D on 01 January 2009, 01:46:14

Quote

Quote

Definately SAI. My previous Elite started doing it.

Best course of action is just to unplug it - there's no harm in that at all. It's more of an annoyance, than a fault :y

call me sad but i like it, :-[

Hahaha!

I tried unplugging the vac pipe to the valve today when I first started the car... Its amazing how much quieter the exhaust is when its unplugged! All the banging and poping stopped, and the overall loudness was less! (Does have a full powerflow exhaust fitted though! and the cats have gone walkies ::) :-X!)