Just moved to LA. Does anyone know of a really good garage that knows our trucks? I'm not getting 100% when I jump on it. Seems to be "shuddering" or hesistating when under the gun. ordinary driving in town or highway is fine. Also getting some valve chatter (just put in some 104+..hopefully this will help the latter). Just put in a Pit Bull Chip. While over all performance is significantly better, I'm still getting the same, very noticable hesitation. Looking for an expert trouble shooter to lend me a hand. Thanks. FYI, paper clip diagnostic came up with nothing.