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Re: Boost = Hesitation
Fuel pump should have battery voltage when cranking, (and when the supercharger is operating). After the engine is running, voltage is reduced to the pump which lowers the pressure. If you connect a fuel pressure tester, and disable the starter: turn the key to crank and watch pressure. Then turn the key to RUN, you should notice the pressure drop down a few psi, then drop slightly when the pump shuts off. GM has a bulletin out for the fuel pump bypass resistor. It changes the wiring and relocates the resistor to the firewall.
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You have to know how it works,
to figure out why it doesn't.
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