I'm having that problem too where the pump randomly wants to work. Now it doesn't work at all. I changed the pump and still nothing. Checked the relays and fuses are all fine. No codes on ecu. What could it be? Whole assembly like you said?
Sorry for the thread-jack.
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1990 Nissan 240SX w/KA24DE - New project
1984 Mazda RX-7 GSL-SE 13B
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