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Replace engine it coincided
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When Porsche changed the engine it coincided with a piece of legislation that ment fresh air has to be pumped 'into' the exhaust gases to meet regs.
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Apologies for a 'numpty' type question :? but I'm just curious to know what the item is shown in the picture below. I notice that it isn't there on earlier cars (pre 2000 / 2001?)
Thanks
YEA, but what is it???? I was just curious this morning but now I've asked the question I really want to know, someone please tell me ...
Oh, and if you haven't got a Flux Capacitor installed check this out!!!
http://kalecoauto.com/index.php?main_page=product_info&cPath=6&products_id=28
It's an emission pump. When Porsche changed the engine it coincided with a piece of legislation that ment fresh air has to be pumped 'into' the exhaust gases to meet regs. If you listen you'll hear it start up when you first start the car up. It will run anywhere from 30sec to 3 min IIRC. It will also come on when revs drop like when you're slowing down in traffic... I think that's correct :? 8)
Someone must know !!
Been looking at all the expanded parts here but the closest thing I can see would be this
http://dcauto.gotdns.com/section/index/3653096/108
an Air Injection System. Pump looks kinda similar but the mounts look all wrong.
Best guess I can come up with.
Brilliant, I can relax now, ahhhhhhh.
One of the reasons for my curiosity is that my 3.4 has one, whilst (I think) every 3.4 engine bay shot I'd seen didn't have one, whereas every 3.6 did.
Thanks everyone :thumbs:
Porsche call it secondary Air injection as Stuart said its an emmissions thing.
Activates at start up the oxygen enrichment it provides helps to get the cats up to operating temp. quickly.
Added from 2000 MY cars onwards
Good write up on pg 217-218 of the '996 essential companion' by Adrian Streather
I think that Stuart has the measure of the thing. Its not an auxilliary vaccuum pump, but emmisions yes.
Regards Big Bob :bye:
PS I expect the member who asked this serious question was a bit fed up being fluxed about :floor:
This is a source reference. Confirm exact model applicability in the original material.
