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My Feb 93 XF van wiring is bog stock and I only have one relay at the brake booster and 2 down at the battery. btw that red circled plug doesn't want to come apart at freeway speeds like mine did, fortunate to avoid a large backfire saving the dizzy gear and rear muffler.

Its definately factory, its all hooked up via the factory loom. I have read this before somewhere. https://www.fordforums.com/threads/xf-efi.45775/ If you check the comments, someone calls out the xf falcon later models, had the starter relay added. Thanks\\Foti

I'm leaning towards neither of them being factory. unleaded XF has an EST computer and map sensor, likely just something to minorly improve emissions at the time. they were often replaced with the leaded dizzy from XE or XF (special LEADED rotor button needed if keeping the XF cap/leads, otherwise use XE rotor and cap/leads) if you use an XE dizzy in the later XF, remove the ECU from the kick panel, one of My XFs had ignition breakdown with it still fitted (faulty) and when removed the problem was gone.