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Boost Controller Install Problem

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Gday Everyone,

I have just installed a Dual-Stage Turbosmart Boost Controller on my R33 GTS-T. Have connected it up as per the install diagram has said to do and when on low boost the car pulls fine and then when switching to high boost and running it, the car jults when accelerating. Low boost setting is 7psi and high is 10psi. Any ideas what this problem would most likely be?

Thx James

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vacuum leak maybe, or do you have a boost gauge maybe boost is going to high and your getting fuel cut

I do have a boost gauge which i installed and it reads correctly as set but it just jults on high boost for some reason. Have been over it a few times closely and cant see any vacuum leaks.

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