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78 fuel pump

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Old May 11, 2024 | 02:04 PM
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rcrone928
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Default 78 fuel pump
Does anyone know if the fuel pump relay has anything to do with tachometer signal on a 78 928?
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Old May 11, 2024 | 11:30 PM
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I believe it references the tach signal, and turns the pump off if it no longer detects RPM.

That said, it's been a while since I looked at that part of the writing diagrams.
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Old May 12, 2024 | 02:21 PM
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Thanks Allen, Just wondering if it passes the signal on to the tachometer itself. My tach only works sometimes if I remove the relay and reinsert it.
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