Guest andypandy Posted April 13, 2010 Share Posted April 13, 2010 hey guys im having trouble with my car overboosting when the second turbo kicks in. If im in a high gear for example forth or fifth and i step on it it'll cut out approx when the second turbo comes in. But if i was to give it in the lower gears making my way up to the higher gears then it wont cut out. can anyone help me out? Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted April 13, 2010 Share Posted April 13, 2010 What state of tune is your car? Quote Link to comment Share on other sites More sharing options...
Guest andypandy Posted April 14, 2010 Share Posted April 14, 2010 its stock at the moment. but its only running at 3psi which im pretty sure is below stock i think. but u cant feel the second turbo kick in when its doing 3psi. but my friend showed me how to make it faster by pulling out some pipe or putting another one in or something. he said its removing the turbo sensor. that makes it go to 5psi and thats when all the cutting out happens at high revs Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted April 14, 2010 Share Posted April 14, 2010 3psi? Stock boost is 9 or 10 so I dont think youre overboosting. And if you removed the turbo sensor it wouldnt run at all. Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted April 14, 2010 Share Posted April 14, 2010 I reckon you have a boost leak. I reckon your mate has put it in TTC mode by bypassing one of the VSV's causing both turbos to come on at the same time. Either that, or he has no idea what he's doing and he's fucked it up. Click on this link to find out how the sequential system works. http://www.mkivsupra.net/vbb/showthread.php?t=35926 Click here to make sure you can put right, whatever your mate has put wrong. http://www.mkivsupra.net/vbb/showthread.php?t=35924 I would check the system for leaks. Try the intercooler first as these are known to fall apart and break down when old. Also check all you hoses and replace if necessary. HTH Quote Link to comment Share on other sites More sharing options...
Guest andypandy Posted April 15, 2010 Share Posted April 15, 2010 (edited) yeh he said something bout bypassing. but i dont feel the second turbo kick in when i dont bypass it but i can when i do bypass. yeh i dont think its overboosting but it does cut out when i do bypass and it gets to around 4000 rpm im not sure why it cuts out in the higher gears but it wont cut out when i give it in all the previous gears Edited April 15, 2010 by andypandy (see edit history) Quote Link to comment Share on other sites More sharing options...
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