MORE 4G63 DSM MPI WIRING DETAILS BELOW:
In this video I show you how to wire a 1G DSM 4G63 MPI relay. A 1G DSM includes the 1990, 1991, 1992, 1993, 1994 Mitsubishi Eclipse, Eagle Talon, and Plymouth Laser. When doing a 4G63 turbo engine swap into another car, this MPI relay is usually the most confusing part of the wiring harness. I do my best to show you what the MPI relay does, and how to properly wire it.

4G63 Wiring Diagrams Here: [ Ссылка ]

4G63 MPI Wires:
- Pin 1 - Empty.
- Pin 2 - Black w/ green stripe - Goes to the fuel pump from the MPI relay. Many people rewire their fuel pump with 8 gauge wire to make sure it has a strong battery-fed power feed. If doing this, you can use this factory black w/ green stripe on pin 86 of a Bosch relay. Learn how to properly hard wire your fuel pump in this video: [ Ссылка ]
- Pin 3 - Black w/ white stripe - Should be given Ignition power. This wire on the MPI relay also goes to pin 110 at the ECU, the Ignition Coil and Power Transistor.
- Pin 4 - Red wire - Goes to Pin 107 and 102 on the ECU. It also jumps over to Pin 5 on the MPI relay, and sends power to the Mass Airflow Sensor, CAS, Wastegate Solenoid, ISC, O2 Sensor, Injector Resistor, Purge Control Solenoid, Fuel Pressure Solenoid, and EGR Solenoid.
- Pin 5 - Connects to Pin 4 on the MPI relay
- Pin 6 - Black wire - Goes to ground.
- Pin 7 - White w/ red stripe - goes to pin 56 at the ECU
- Pin 8 - Black w/ blue stripe - Goes to Pin 63 and 66 at the ECU.
- Pin 9 - Black w/ yellow stripe - This Goes to Pin 108 at the ECU AND the small wire on the engine's starter relay. This should ONLY be given power when the engine is cranking from the starter. The moment you let go of the key (when the engine starts up), this wire should go dead.
- Pin 10 - Black w/ red stripe - This should go to a 20A fuse fed right off the battery.

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