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A lot of times people think the secondaries are not kicking in because they can not "feel" them. My sons 390 AMX had the same problem, we could not feel the secondaries kick in even though I installed the weakest spring. The problem was that they were too lean. I took out the secondary plate and drilled out the main feed holes with a .78mm (I think this was the size) drill. After doing this, the car would really pull when the secondaries opened. So, . . they were opening all along, but they added little to the overall power because they were too lean. Once I richened them up, the car ran great.
Ed
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LIFE IS TOO SHORT TO WORRY ABOUT GOOD GAS MILEAGE
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Utinam logica falsa tuam philosophiam totam suffodiant!
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