Re: Injection Pump and FSD
The FSD/PMD relocate needs to happen whether the pump gets replaced or not. I'd say to get a new driver and relocate it, then see what happens. Labor goes down substantially when you're relocating the driver since the PITA is always mounting it on the pump and you sidestep that when you relocate. Worst case scenario-you end up needing a new pump. Your description of the problem leans toward a FSD/PMD anyway.
While you're at it-have the dealer ck the lift pump and ck for air in the fuel lines(typically tank selector valve). Either of those going out will get you a false optical sensor code(sensor doesn't like air bubbles) and will cause the PMD/FSD to overheat.
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