i have noticed this new exact same problem. car's system hasnt changed at all since installing the empeg, and the empeg never displayed this behaviour, till recently. last thing i did was : updated hijack. cant remember what version i am currently running (still on 2.0b11) but now when waking the empeg from standby to on, it will delay a noticeable 3/4 secs and the battery icon comes on. never did it before. i have an Optima yellowtop 750cca 52amp/hr battery, so i do not believe current is an issue, especially since the unit was fine before. my voltmeter reported a steady 13.4V one time, and empeg still delayed its start and put up the battery icon. in fact i may downgrade to an earlier hijack and see if this goes away - will try this later tonite and post here - unless im wrong and this is not hijack related.
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[P] '86 Civic Si turbo Mk2a 40Gb Smoke, 030102710