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Idle and dome lights surging

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Old Jul 13, 2025 | 03:08 PM
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Bsmith062579
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Idle and dome lights surging

2008 G37S Coupe — aka The Electrical Mystery Box.
Tried 5 alternators, new IPDM, fuse check, new AGMs. Only now got it to finally charge at 14.6V.
Cool, right? Except now the idle surges like it’s gasping for air and the dome lights are flickering in sync.
Is this some kind of grounding issue?? Before I just start throwing parts at it again… any ideas?
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