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Power lean issues!

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7 May 2014
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Hi All!

New owner of a s15 spec R, been driving her since 4 days now and noticed that above 5500rpm the power seems to be lean as I don't feel any boost gain above these rpm range. No check engine light on etc. But its equipped with a Greddy profec B spec boost controller but it seems really old and everything is switched to maximum range even on low boost section or high boost section. Even the balance is on maximum sharp range. Any help for the set up needed? my car is stock but with a FMIC. Thanks
 
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