I just installed one of the AEM analog display boost gauges and it doesn't seem to autozero correctly. It will read zero during idle unless I let the ignition in the accesory position for a few seconds before trying to start the engine. I think this is because my switched power source doesn't stay on during engine cranking. I'm currently using the MR factory gauge supply for the switched supply. Does anyone know offhand any circuits to tap that stay on through the on, run, and crank positions of the ignition switch?