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3-12 FUEL SYSTEM (DFI)
Specifications
Item Standard
Digital Fuel Injection System
Idle Speed 1 100 ±50 r/min (rpm)
Throttle Assy:
Type Four barrel type
Bore
43 mm (1.7 in.)
Throttle Body Vacuum 31.5 ±1.3 kPa (236 ±10 mmHg)
Bypass Screws –––
ECU:
Make Mitsubishi Electric
Type
Digital memory type, with built in IC igniter, sealed with
resin
Usable Engine Speed 100 ∼ 12 987 r/min (rpm)
Fuel Pressure (high pressure l ine):
304 kPa (3.1 kgf/cm², 44 psi) with fuel pump running
280 kPa (2.9 kgf/cm², 41 psi) with fuel pump stopped
Right after Ignition Switch ON, with
fuel pump running for 4 seconds
with engine idling
304 kPa (3.1 kgf/cm², 44 psi) with fuel pump running
Fuel Pump:
Type In-tank pump (in fuel tank), or Wesco pump (friction pump)
Discharge 72 mL (2.43 US oz.) or more for 4 seconds
Fuel Injectors:
Type INP-286
Nozzle Type One spray type with 10 holes
Resistance About 11.7 ∼ 12.3 Ω at 20°C (68°F)
Main Throttle Sensor: Non-adjustable and non-removable
Input Voltage DC 4.75 ∼ 5.25 V between BL and BR/BK leads
Output Voltage DC 0.65 ∼ 3.90 V between Y/W and BR/BK leads (at idle
throttle opening to full throttle opening)
Resistance 4 ∼ 6kΩ
Inlet Air Pressure Sensor/Atmo-
spheric Pressure Sensor:
Input Voltage DC 4.75 ∼ 5.25 V between BL and BR/BK leads
Output Voltage DC 3.80 ∼ 4.20 V at standard atmospheric pressure (see
this text for details)
Inlet Air Temperature Sensor:
Resistance
2.09 ∼ 2.81 kΩ at 20°C (68°F)
About 0.322 kΩ at 80°C (176°F) (reference value)
Output Voltage at ECU About 2.25 ∼ 2.50 V at 20°C (68°F)
Water Temperature Sensor:
Resistance see E lectrical System chapter
Output Voltage at ECU About 2.80 ∼ 2.97 V at 20°C (68°F)
Speed Sensor:
Input Voltage at Sensor DC 4.75 ∼ 5.25 V between BL and BR/BK leads
Output Voltage at Sensor About DC 0.05 ∼ 0.09 V or DC 4.5 ∼ 4.9 at Ignition Switch
ONand0km/h
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