Main Relay - Car Not Starting
written by: 98CoupeV6
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Having trouble starting your car when it's in the sun or at odd times? It could very well be the 'Main Fuel PGM-FI Relay'. It's a very common problem on all generations of Accords.
PURPOSE: Supplies power to the Engine Control Module (ECM) , injectors and the fuel pump.
OPERATION: The main relay actually contains two individual relays.
One relay is energized whenever the ignition is on, and it supplies the battery voltage to the ECM, power to the injectors, and power to the second relay.
The second relay is energized for 2 seconds when the ignition is switched on before starting, and when the engine is running, to supply power to the fuel pump.
1990-1993 Accord
1994-1997 Accord
1998-2002 Accord:
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Got a question on this topic? Go here:
https://www.honda-acura.net/forums/s...d.php?t=202098
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