Theres whats called a combi valve, which I would assume is non return, but don't quote me on that lol

This is going way off topic but hey ho,

There is a valve that is fitted to the side of the engine that opens and closes as the sai cuts in and out, controlled by the N112 solenoid valve its looks abit like a big actuator on a turbo and does a simliar thing but just opens and closes a flap to exhaust port, there is a thread with picture and blanking plate fitted to heat floating around somewhere,

As it only works for first 3 minutes when the engine is cold anyway i carn't see it doing much damage to stuff in exhaust track

As it only works for first 3 minutes when the engine is cold anyway i carn't see it doing much damage to stuff in exhaust track

100 seconds at the most according to the factory repair book

Pulled out 100 and car still starts and no air pump noise, but i drove the car a few hours ago so still warm, will see if it stops in the morning.

Big thank you mate.

Do I take it that the SAI equipped engines must have increased horsepower per unit of capacity, as compared with the previous generation in order to compensate for the loss of horsepower per unit of fuel consumed when the fuel is burnt in the exhausr instead of the engine ?

If there is no increase in HP then MPG will be down.

Above my paygrade, but how did VAG get that past the Euro rulesters ?

Interesting comment here:-

http://en.wikipedia.org/wiki/Secondary_air_injection

Of course the american experience may be different

Nick

Edited 27 June, 201313 yr by Clunkclick

:rofl: ok smart ass it was just a random guess :rofl:

It only does it when cold, for max 100 seconds

THe MPG is not great but does perk up no soon as the pump has done it's thing

Do I take it that the SAI equipped engines must have increased horsepower per unit of capacity, as compared with the previous generation in order to compensate for the loss of horsepower per unit of fuel consumed when the fuel is burnt in the exhausr instead of the engine ?

If there is no increase in HP then MPG will be down.

Above my paygrade, but how did VAG get that past the Euro rulesters ?

Nick

You would be supprised how many manufacturers have this system fitted, my little 00M/Y corsa sport has one as did many bigger volvos around 96 to 2000, apart from volvo fitted them in the wing behind the bumper so they used to fill with water and not work alot of the time

Somebody's got to arrest the decline in World wide refining capacity ?

Go VAG !

Just put a bit more carbon fibre on the wings and tailgate and you get better MPG than the previous generation.

Presume that the Euro numpties were fully aware of that when they OK'd it.

Nick

Somebody's got to arrest the decline in World wide refining capacity ?

Go VAG !

Just put a bit more carbon fibre on the wings and tailgate and you get better MPG than the previous generation.

Presume that the Euro numpties were fully aware of that when they OK'd it.

Nick

It's a conspiracy Nick !!!!

All it does on this engine is warm the cat quicker which in turn reduces consumption.

And if I got it right it was only introduced for the California emissions laws as the engine made it over there.

I don't think Euro spec even cares its there as we can remove it and still get past an MOT as when the engine is hot it does nothing.

Merged with a thread about SAI specifics

It's a conspiracy Nick !!!!

All it does on this engine is warm the cat quicker which in turn reduces consumption.

And if I got it right it was only introduced for the California emissions laws as the engine made it over there.

I don't think Euro spec even cares its there as we can remove it and still get past an MOT as when the engine is hot it does nothing.

So it could be that the car imported into the UK is diversion stock, set-up with Californian ECU and engine settings and a Californian Catalytic converter.

That does make UK type approval a bit of a joke - just imagine if you were trying to do a personal import on that basis.

As you say, no conspiracy (Or lobbyists) there, just pure motor trade ****-up.

One statesside video I saw said that even vehicles over there were having problems, which were apparently caused by air leaking-in round a rivetted joint on the air pump. Once the rivets were drilled-out and replaced with bolts the leak was stopped and the misfire disappeared. That would definitely be a kerchinggg for Skoda UK on the recall front. I can see why they might want to bury that.

Nick

Edited 27 June, 201313 yr by Clunkclick

Quick question guys, where can i get the blanking plug for airbox as ive got the other stuff ready to do sai removal but im running standard airbox with pipercross panel

I'm sure a layer or two of gaffer tape would suffice as a temp fix if it's holding you back 

This is what I've used:

http://www.diy.com/nav/fix/hardware/ironmongery/castors___floor_protection/-specificproducttype-castor_cups/B-and-Q-Rubber-Slip-On-Tubular-Furniture-Tips-9370524?skuId=9671229

 

Fits perfectly and they're black so they blend in. You just need to separate the plastic flexi pipe from the 90deg connector (twist and tug) and push this over the open end in place of the pipe. Then just clip your little stubby assembly back onto the side of the airbox. Sorted!

 

Champagne cork also fits...... http://www.briskoda.net/forums/topic/246865-ribbed-for-your-skodas-pleasure/

Hi there, new to this site. I like many have secondary air pump trouble. Am I right in thinking (having read many of the above posts) that if I get my VRS remapped I can get the pump shut off altogether? Sounds like a option cheaper (and a lot more fun) to have it remapped and sort it out that way than just get the pump fixed.

Will it do any harm to not have it working?

I am rubbish when it comes to working on the thing under the bonnet but I've just fixed my secondary air pump myself. Heard so many people say it's easy and I was getting sick (and embarrassed) of the noise when starting from cold, thought it was worth a try.

Didn't want to take it out or do other things that would result in having the engine management light on all the time.

OK so it took me hours but it only cost me about £6 for parts (and a tool). There are step by step guides for doing this and I had to day it's well worth doing. The result will be clear tomorrow morning but looks line it's done the job.

The problem is that the rivets go on the unit and air last out making it sound like a POS when cold. Get the rivets out and replace them with bolts and do up tight. Easy! Getting g it in and out is the hard part but if I can do it anyone can.

Here in Holland a tuner said you will not only need to map "the light out", but also map to compensate for cold starts. He even said that if you don't, you could end up with an engine not willing to start in a cold climate (like Sweden).

SAI is emission based, it has nothing to do with the actual running of the engine. Cold air blows onto the front face of the cat to heat it up quicker whilst stationary. As soon as that turbo spools up things are getting plenty hot anyhow.