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Look at the pin output. There is a pin out of the AEM that is a sensor ground. The ECU grounds the fuel pump relay and the ecu is programed to prime that relay for the set amount of time you enter in the AEM then shut back off till you turn over the motor. Then when the AEM senses that the motor is running it keeps the fuel pump relay primed to stay running. Check that wiring
J. R.
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