Applications Toyota 1FZ-FE
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.
Toyota 1FZ-FE
4.5 L straight six in the 80-series and 100-series Land Cruiser. Distributor ignition, batch or semi-sequential port injectors from the factory, cable throttle, high impedance. There is no 1FZ decoder in the rusEFI trigger list this note was checked against.
Recommended: F7 or V4 for six injectors. Six logic coils only after a crank-trigger and COP conversion. Keeping the distributor means one igniter on Ign 1 and a logged trigger, not a guessed tooth count. V4 pins are TBD.
Status: draft. Trigger offset has not been confirmed on a running Race Core install.
- Cylinders: 6
- Displacement: 4477 cc
- Firing order: 1-5-3-6-2-4
- Orientation: Cylinder 1 at the front (fan end). Firing order 1-5-3-6-2-4, the Toyota straight-six order.
Variants
| Variant | Years | Trigger | Notes |
|---|---|---|---|
| 1FZ-FE 80-series | 1992–1997 | Distributor | Batch injection, cable throttle, AFM or MAP depending on market. |
| 1FZ-FE 100-series | 1998–2007 class | Distributor | Same firing order and the same decoder problem. Do not assume a 36-2 was fitted at the factory. |
Recommended pin assignment (Race Core F7)
Pins below are the library default Race Core F7 map — the same AMPSEAL landings as the verified 1UZ-FE, 2JZ-GTE and LS1 notes. Core EFI V4 and Micro Core cavity numbers are TBD. If a pin is not in this table, it is TBD. Do not guess a spare.
| Pin | TunerStudio | Function |
|---|---|---|
| B5 / B13 | VR 1+ / VR 1− | Crank, if the sensor is 2-wire VR |
| B10 | Digital 1 | Crank, if the sensor is 3-wire Hall |
| B4 / B12 | VR 2+ / VR 2− | Cam VR |
| 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 |
| A5 | Lowside 5 | Injector cylinder 5 |
| A6 | Lowside 6 | Injector cylinder 6 |
| 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 |
| A32 | Ign 5 | Cyl 5 logic coil |
| A31 | Ign 6 | Cyl 6 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 |
| A20 | Lowside 10 | Fuel-pump relay coil |
| A21 | Lowside 12 | Main-relay coil |
| A12 | Lowside 15 | Radiator-fan relay coil |
| B17 / B16 | CAN 1 H / L | Dash / wideband |
| 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 − |
| C9 / C21 / C32 | 5 V Sens 1 | MAP, TPS, pedal 1 |
| C1–C8, C29, C31 | Sensor GND | 0–5 V and thermistor returns |
Trigger
Factory ignition is in the distributor. That pickup is not a named Race Core / rusEFI mode. The reliable path is a 36-1 crank wheel plus a cam for sequential.
Crank
| Factory | Distributor. Do not select 12-tooth JZ or 36-2. |
| Conversion | 36-1 Hall on Digital 1 or VR on VR 1. |
Cam
| Sequential | One pulse per cam revolution on Digital 2 after the conversion. The distributor body is not a cam decoder by default. |
TunerStudio
| Setting | Value |
|---|---|
| Trigger / wheel type | 36-1 + cam after the wheel is fitted. Factory: unsupported until logged |
| Use only rising edge | VR: typically yes on MAX992x. Hall: as logged |
| Invert primary | No — swap VR wires first |
| Firing order | 1-5-3-6-2-4 |
Offset: Light on cylinder 1 at the front pulley. A distributor engine with the rotor in the wrong tower will still “sync” and fire the wrong cylinder.
Injection
Six high-Z port injectors. Factory fuelling is batched. Sequential needs the cam sync above. Meter the injectors before you drop a resistor pack that may not exist.
| Impedance | High-Z expected. Confirm with a meter. |
Ignition
Distributor: Ign 1 into an igniter. The distributor module pin is TBD. COP conversion: Ign 1–6 in cylinder-number order, firing order in software. Logic outputs do not sink a dumb coil.
| Dwell | Follow the igniter. A logic COP starts at 2.0–2.5 ms. |
Idle
Cable throttle and an idle air valve. Pin for that valve is TBD unless you are driving a bipolar stepper from the F7 H-bridges, and then you cannot also fit DBW.
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.