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93 Posts
I have been having a weird kind of stutter under WOT in 2,3,and 4 forward gears, like rthe engine surges a little then almost stalls, the boost gets all wacky, and then it just stops freaking out and is fine. I have heard the factory TBB on the S4 is weak, could this be a root problem? Would the SAMCO fix it/help any?
