Hoses not connected?

[VanishingPoint]

Hi, just found this forum so thought id join up.
Currently on my 2nd Saab (2002 9 5 Aero) after previously owning a 2.0 LPT 9 5 .
Im not sure if i have a problem with my car but thought the performance was a bit down so had a mooch around under the bonnet. I already know about the "bolt mod" so thought id check that first.
Well first surprise is that the top hose from the plastic valve thingy(?) is quite short and not connected to anything.
Second surprise is i found another small rubber hose nearby coming of what i think is called the cobra pipe? This was not connected to anything either.
Rightly or wrongly i put a bolt in that hose but not much has happened. Ive added a photo as im not the best with describing anything -



Would this stop me getting full power?

[sgould]

Welcome!

I thought that I had an answer.  I have a large collection of pictures from my 02 Aero (now sold), but it seems that I have covered almost the whole engine except that bit!

I have some other info from the Saab workshop manual, but I can't get to that until later in the day.

If the 2007 car is the same I may be able to look at that later too.

[VanishingPoint]

Ok , thanks for the welcome

[sgould]

I've found this sketch on the Workshop system.  It shows the pipework of the EVAP system that vents the petrol fumes from the tank.

Note the tee pieces and non-return valves.

[VanishingPoint]

Ah, thats useful. I can see now whats happened.
The part marked " the T" is not there on mine and ill have to find the hose (upper arrow). Cant see it when ive looked.
Do you think it just blown apart - and what is likely to happen with all this missing.
Ive put a bolt in the hose (lower arrow). Is that not a good idea? Thanks

[sgould]

The bolt is usually put in the end of the top of the three where you have ringed "Boost control valve".  That leaves the pipe from the inlet cobra to the throttle body.  But yours is missing.

In that situation you do need to block the short tube from the cobra.  At least until you have the situation rectified.  Otherwise the inlet air will be escaping.  It will be escaping between the air measurement as the pipe comes through the wing and the engine, so the engine will be running rich -  or lean when it's sucking in air as the turbo boosts.  Long term this will confuse the lambda sensor and the check engine light will come on. I'm surprised that it's not on at the moment.  Is it working?  It should light up when the ignition key and go out when the engine starts.

If the EVAP system senses a leak the CEL light comes on too.  This can happen if the filler cap is left off.  So if you change things you need to think through what is going on.  The idea is to suck fumes into the inlet at the throttle body on overrun whn there is low pressure at the throttle body and to change the route to suck the fumes into the cobra when the turbo is boosting and the throttle body is at high pressure.

To be honest, I would replace the pipes with silicone and try and find some non-return valves.  Saab supply the whole assembly of pipes and valves in one piece - for £150.

[VanishingPoint]

The CEL light is working fine, so far it seems I've been lucky.
I have already changed the hoses for silicon in the rest of the engine bay, just not those at the front. Think I bought 4 and 6 mm for those, any idea what size the ones at the front are?
Unfortunately our local dealership closed down a while ago so Ill have to search around for the one way valves and t piece. Saying that, Ive used Neos before, might be worth checking there for the parts.
Thanks again for the help.

[VanishingPoint]

I love it when you can sort your car for £2.50!
Bought a 6mm t piece, put it back in place and all seems good now. Knuckles ended up red and sore as there wasn't much room, maybe I should have undone the bolt at the top of the cobra pipe and see if it would've moved out the way.
It pulls well and smoothly now but ill keep an occasional eye on it to make sure the t piece doesn't disappear again.

[Max Headroom]

...Knuckles ended up red and sore as there wasn't much room, maybe I should have undone the bolt at the top of the cobra pipe and see if it would've moved out the way.

You want to try working on aircraft if you think cars have difficult access!

I'd like to meet the designers of the aircraft I work on ...Preferably down a dark alley 

[Steve440]

I used to work on English Electric Lightnings 25 years ago, they were a nightmare as most of the access panels were smaller than the components inside them. Parts were often taken apart outside and put back together inside hoping you did not drop anything.

Steve

[Max Headroom]

LOL - similar on Hunters Steve! I remember tying spanners onto string in case they got dropped. Some of our training aids at Halton were on bits Lightning - hands through two panels trying to lock-wire stuff blind!


Anyway off topic here - soreee!

[john]

RAF Halton. Nice part of the country around there

[sgould]

SWMBO lived on site at Halton when she was very young.

[Max Headroom]

Still waaay off topic, but wanted to add that I once had a free run around the officers mess for a few days - which was I believe once a house belonging to the Rothschilds estate and was known for some outrageous parties - there hardly one part I haven't explored