2jzjay Posted February 16, 2018 Share Posted February 16, 2018 Before taking apart my engine for a rebuild, my standard sequential turbo system had an issue, As the second turbo was about to come in, it would hesitate/flutter then come in. Would still pull hard once it had come in. Tested all vsvs tonight, they are all ok. No split pipes what I can see. Just wanted to see if anyone had any ideas before to freshly built motor goes back in?? It was also running a greddy boost controller. Have not tested that solonoid though. Any ideas/help would be great. Quote Link to comment Share on other sites More sharing options...
StainedBedSheet Posted February 17, 2018 Share Posted February 17, 2018 Ebv? Quote Link to comment Share on other sites More sharing options...
Sandesupra Posted February 17, 2018 Share Posted February 17, 2018 Test everything!;-) should have tested the kit in ttc before removal, know you tested the vsv’s but then you would also have checked the solenoid on the ebc.. but should have would have could have;-) My guess would be on the EGCV actuator or butterfly. Test with a vacuum tester that it opens and closes easy and to the correct spec. I’ll see if I can’t find the chart with all the numbers... Quote Link to comment Share on other sites More sharing options...
Sandesupra Posted February 17, 2018 Share Posted February 17, 2018 Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted February 17, 2018 Share Posted February 17, 2018 The normal problem for boost issues is the IACV solenoid, on top of he pipework at the rear. Quote Link to comment Share on other sites More sharing options...
2jzjay Posted February 17, 2018 Author Share Posted February 17, 2018 Thanks for the advise.... I'll check the egcv operation later. That's a handy diagram. The IACV vsv is operating as it should atm....but it was intermittant. Also it was strange how it was kind of like fluctuating before it came in, and vsvs are either on or off. May be worth replacing anyway if I can actually find some! Quote Link to comment Share on other sites More sharing options...
meister_raul Posted May 6, 2018 Share Posted May 6, 2018 Have you solved this? I am getting no boost from first turbo and my second one kicks from 4000 rpm when i pressurise the system....all vsv work fine, and vacuum lines seem good Quote Link to comment Share on other sites More sharing options...
Scooter Posted May 7, 2018 Share Posted May 7, 2018 Raul this should help http://www.mkivsupra.net/vbb/showthread.php?35926-The-sequential-system&highlight=sequential Quote Link to comment Share on other sites More sharing options...
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