There should not be any hoses terminating in "thin air".bugs11 wrote:Interesting. All the vacuum diagrams I looked at show that center (blue) line coming off the TCV ending in thin air. I plugged the hose into the nipple, see if it makes any difference. There is a skinny steel line running along the firewall but it terminates into the ABS pump.
Any hose doing that will suck unmetered air into the system, or leak boost, which will lower your performance. Replacing all your hoses was smart, though - vacuum leaks on these cars from crumbling hoses is far and away what creates the most troublesome errors and symptoms with these cars - but still so easy to prevent.
I suppose you've been looking at something like this:
where it seems that the blue line ends in thin air, but if you look left, above where it says "Air filter", there's a note saying that the line should go "To fresh air hose". It's easy to overlook it - I certainly did the first times I was figuring out where all the hoses go.
- S