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Anyone else: Gen 3 Prius rough cold start plus slow coolant loss

MileageHunterCommunity StarterNov 18, 20252013 Toyota Prius ThreeLos Angeles
Older Prius has developed a rough shake for a few seconds on some cold starts and the coolant level seems to be dropping slowly. I don't want to assume the worst. What test sequence would separate ignition, EGR/intake issues and an internal coolant leak? Trying to diagnose before I book a shop.
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