Applications Mitsubishi 4G63
Draft. Trigger offset has not been confirmed on a running Race Core install. Pins marked TBD are unknown — do not guess them. A wrong decoder or firing order can destroy the engine.
Mitsubishi 4G63T
DSM, EVO 1–9. Factory CAS is the 4G63 2+2 / 4+2 optical-style pattern — supported as MITSU_4G63. EVO 4+ is COP; earlier is wasted-spark. EVO 9 adds MIVEC.
Recommended: F7 or V4. Four sequential, COP on EVO 4+, 4G63 CAS decoder or 36-1 conversion.
- Cylinders: 4
- Displacement: 1997 cc
- Firing order: 1-3-4-2
- Orientation: Cylinder 1 front (timing belt). EVO 1–3 engine on the left of the bay; EVO 4–9 flipped to the right.
Variants
| Variant | Years | Trigger | Notes |
|---|---|---|---|
| 1G DSM / EVO 1–3 | 1989–1995 | 4G63 CAS | Wasted spark, cable, 7.8–9.0:1 depending. |
| EVO 4–8 | 1996–2005 | 4G63 CAS / crank+cam | COP, engine bay flipped, anti-lag hardware on some. |
| EVO 9 | 2005–2006 | CAS + MIVEC | Continuous intake MIVEC. |
Recommended pin assignment (Race Core F7)
| Pin | TunerStudio | Function |
|---|---|---|
| B10 | Digital 1 | Crank Hall |
| B1 | Digital 2 | Cam Hall |
| A3 | Lowside 1 | Injector cylinder 1 |
| A15 | Lowside 2 | Injector cylinder 2 |
| A4 | Lowside 3 | Injector cylinder 3 |
| A16 | Lowside 4 | Injector cylinder 4 |
| A35 | Ign 1 | Cyl 1 logic coil |
| A34 | Ign 2 | Cyl 2 logic coil |
| A22 | Ign 3 | Cyl 3 logic coil |
| A33 | Ign 4 | Cyl 4 logic coil |
| C20 | Analog Temp 3 | CLT |
| C30 | Analog Temp 2 | IAT |
| C13 | Analog Volt 1 | MAP 0–5 V |
| C24 | Analog Volt 2 | TPS 1 |
| C34 | Knock 1 | Knock bank 1 |
| A20 | Lowside 10 | Fuel-pump relay coil |
| A21 | Lowside 12 | Main-relay coil |
| A12 | Lowside 15 | Radiator-fan relay coil |
| A2 | Highside 1 | VVT bank 1 / intake |
| A14 | Highside 4 | VVT 4 / boost solenoid |
| B18 | Battery Sense | Ignition-switched 12 V (5 A fuse) |
| B23 | +12 V MR | Main-relay 12 V into ECU |
| A17 A18 A24 B14 B19 B20 | Power GND | Engine block → battery − |
Trigger
Factory CAS is MITSU_4G63 / 4G63 CAM+CRANK — supported. Aftermarket 36-1 crank triggers are also common and simpler. Do not mix a 4G63 CAS with a 36-1 decoder.
Crank
| CAS | Two tracks. Digital 1 / Digital 2 as crank and cam per the 4G63 decoder. |
Cam
| 36-1 conversion | Missing-tooth on Digital 1 or VR 1, cam Hall Digital 2. |
TunerStudio
| Setting | Value |
|---|---|
| Trigger / wheel type | MITSU_4G63 CAS —or— 36-1 + cam |
| Use only rising edge | VR: typically yes on MAX992x. Hall: as logged. |
| Invert primary | No — swap VR wires first |
| Firing order | 1-3-4-2 |
Offset: Light on cylinder 1. EVO damper marks are tiny.
- EVO 4–9 CAS pinout is not the 1G DSM CAS pinout. Photograph the connector.
Injection
High-Z on most EVO, some DSM low-Z with a resistor. Meter. Sequential four. 450–560 cc OEM EVO.
| Fuel | Return, 1:1. |
Ignition
EVO 4+ COP logic Ign 1–4. DSM wasted-spark igniter on Ign 1–2.
| Dwell | 2.2–2.8 ms COP. |
Idle
Stepper on some, 2-wire ISC on others. Identify the valve.
First start
- Load the matching variant configuration in TunerStudio before the harness is live — injectors and coils stay disconnected until the decoder is confirmed.
- Fuel pump fuse out. Coils unplugged or spark outputs disabled. Crank. Open Diagnostics → composite / high-speed logger.
- Confirm crank teeth are even, the missing-tooth (or named pattern) is a single clean gap, and cam is one pulse per two crank revolutions for sequential four-stroke.
- RPM during cranking should sit in the 150–350 rpm band. 0 rpm or 12,000 rpm means the decoder is lost — polarity or wheel type, not offset.
- Lock timing to a fixed 10° (idle control off). Timing light on cylinder 1. Change trigger offset until the damper agrees with 10°.
- Recheck at ~3,000 rpm. If timing walks with RPM, it is VR polarity, a delayed Hall, or the wrong decoder — not offset.
- Enable spark. Confirm a healthy burn (timing light or plug colour) with fuel still disabled.
- Enable fuel. Prime, then crank. Catch the first idle on a rich-safe VE, then lean toward stoich at idle.
- Only then enable closed-loop idle, VVT, boost and traction. A base map is a starting point, not a dyno tune.
A base map is a starting point, not a dyno tune.