V6 Petrol Surf and Snorkel

[penetrator]

I installed a snorkel on my V6 surf myself and used an expoxy resin around all hose ends and joins aswell as a coating of auto silicone around the joins. When i put my hand over the snorkel at windscreen height the engine doesent stall. It runs as if it is about to stall. There might have been a small sound of air being sucked in around the air filter box. I am assuming that the engine should stall pretty much straight away?
I have just siliconed the two parts of the air filter housing together and will try again when this sets. If it still fails to stall should i assume a hole in the tubing between the filter box and snorkel in the guard?(all the snorkel and tubing were second hand) or i have noticed there seem to be a lot of vacum hoses coming off part of the air intake - are these the problem / are they neccessary as the surf that i got the snorkel off didnt have any of these connected.
If anyone can enlighten me a bit more that would be great. By the way im not planning on dunking it in the river any time soon like this either

[penetrator]

Well looks like it must have been the seal around the air filter box that was sucking air in.
As i said i sealed that with auto silicone and it stalls straight away now so that puts my mind at ease now if i need to do a reasonable river crossing on future hunting trips.