J_Supra_07 Posted June 13, 2009 Share Posted June 13, 2009 I have the problem of the seconded turbo not boosting. I have already checked the turbo out. I had time on my hands 2day so I striped the egcv off, and checked it over. All appeared to be in order. So I had time so striped everything off turbos also. Seconded turbo is in good condition. I have put it all back together again and still no seconded boost. I believe it’s the IACV. Would others agree? Thanks jason Quote Link to comment Share on other sites More sharing options...
b_have Posted June 13, 2009 Share Posted June 13, 2009 No. Nothing whatsoever to do with the IACV. (Whats an aurotop?) Quote Link to comment Share on other sites More sharing options...
J_Supra_07 Posted June 13, 2009 Author Share Posted June 13, 2009 lol only just noticed that. Thanks. Why would you say that? What ells should I look at then? Quote Link to comment Share on other sites More sharing options...
mikeyb10supra Posted June 14, 2009 Share Posted June 14, 2009 No. Nothing whatsoever to do with the IACV. (Whats an aurotop?) Why not?? Its a common cause for number 2 not working correctly Quote Link to comment Share on other sites More sharing options...
Chris and Alana Posted June 14, 2009 Share Posted June 14, 2009 I had a problem with no second turbo and it was quite intermittant, which made it awkward to find the problem. Mine turned out to be the IACV vsv. My symptoms were full boost on first turbo (about 11psi) then as the revs reached 4k rpm I noticed the exhaust note change slightly but no increase in boost or power just the same 11psi. When I checked the resistance across the vsv it was fine and always opened when I put 12v across it so it tested fine. Once I replaced it though the problem was gone. Quote Link to comment Share on other sites More sharing options...
dude Posted June 14, 2009 Share Posted June 14, 2009 Check the 2 very small vacum pipes down the back of No2 turbo, they are about the size of washer pipe and you will need a pair of long nosed pliers to get to them, try swapping them over, if they are on the wrong way round you will get no No2 turbo. Quote Link to comment Share on other sites More sharing options...
b_have Posted June 14, 2009 Share Posted June 14, 2009 Why not?? Its a common cause for number 2 not working correctly Sorry guys, misread the acronym. I always refer to the idle air control valve as IACV,its actually known as the ICV which is nothing to do with the sequencial system. Quote Link to comment Share on other sites More sharing options...
J_Supra_07 Posted June 14, 2009 Author Share Posted June 14, 2009 thanks guys. i have a friend thats going to let me borrow his to check it out :-) Fingers crossed Quote Link to comment Share on other sites More sharing options...
jacko Posted June 14, 2009 Share Posted June 14, 2009 I had a problem with no second turbo and it was quite intermittant, which made it awkward to find the problem. Mine turned out to be the IACV vsv. My symptoms were full boost on first turbo (about 11psi) then as the revs reached 4k rpm I noticed the exhaust note change slightly but no increase in boost or power just the same 11psi. When I checked the resistance across the vsv it was fine and always opened when I put 12v across it so it tested fine. Once I replaced it though the problem was gone. Sounds exactly the same as the problem on mine, just got to get an IACV VSV Quote Link to comment Share on other sites More sharing options...
J_Supra_07 Posted June 15, 2009 Author Share Posted June 15, 2009 Swaped with a mate's IACV. and it did not work. so will chack all my boost pipe's anything els i should check guys? Quote Link to comment Share on other sites More sharing options...
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