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Unhooked MBC still hitting 25psi???

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Old Feb 14, 2007 | 06:49 PM
  #1  
scottatyamaha's Avatar
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From: South Carolina
Unhooked MBC still hitting 25psi???

Well i have been having a issue with boost creep since I installed my turbo, in 4th gear it would creep to 25psi. Well I adjusted my wastegate actuator rod out and that helped with the creep but was still high boosting. So I unhooked the mbc and it still boosted 25psi. I just about have the rod adjusted all the way out and still have this problem. Mods are in my sig and I have checked to make sure that the flapper on the hotside moves freely and it does and also this is not the optional high pressure wastegate. Anyone have any ideas?

Last edited by scottatyamaha; Feb 14, 2007 at 06:51 PM.
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Old Feb 14, 2007 | 06:51 PM
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From: Arizona, FTW
hmm i believe it is your ss 02 housing, I have heard that some of them like to boost creap, you might need to get your hotside ported out..
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Old Feb 14, 2007 | 06:56 PM
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Well I think I got the creep taken care of, but the main concern now is that even with the MBC unhooked I still boost like 25psi. The wastegate pressue should be 12psi.
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