Anyone? I've done the TTC mod by changing the VSV hoses and I got a big spike, then when the boost settled it slowly dropped off, again with a wooshing sound. I left it for 4 hours and when I removed one of the vacuum hoses there was a large psssst, indicating the pressure tank and sequential system hoses should be leak free.
Are there any other air hoses coming off the manifold I should check?
I've tested the feed to the boost gauge (held nicely) and tried the other stock BOV, which I've fitted using jubilee clips rather than the stock Toyoya clips, which seemed a bit loose.
Some suggestions please...
J