markssupra Posted June 20, 2011 Share Posted June 20, 2011 Hi all, Still having boost problems, seems to be an intermittant fault as sometimes second turbo is working and boosting upto 1.2 bar, other times only first turbo boosting to around 0.7-0.8. I am running a Profec B spec II EBC and while watching the vaccum/ boost display before I had problems it would vary very slighty while cruising. Now it seems to stick on 0.0 bar for longer unless I lift off completely (-0.75 bar) or accelerate. I think the IACV vsv is not working correctly or the EGBV vsv. Could the small inline filter to the Boost controller cause this? Any advice would be helpful or if someone has some working VSV's I could use to eliminate problems. Thanks Quote Link to comment Share on other sites More sharing options...
SupraShaun Posted June 20, 2011 Share Posted June 20, 2011 I had a problem with low boost like this. I replaced the IACV VSV with a brand new (£75.62 delivered at the time) one from Whifbitz and it's fine now. Quote Link to comment Share on other sites More sharing options...
Nic Posted June 20, 2011 Share Posted June 20, 2011 FAQ thread: The Sequential System Sequential Turbo problems Quote Link to comment Share on other sites More sharing options...
markssupra Posted June 26, 2011 Author Share Posted June 26, 2011 Thanks. Looks like I have found the problem, swapped vac hoses to change to TTC mod and hit 1.2 everytime. IACV vsv is the culprit. Quote Link to comment Share on other sites More sharing options...
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