KEIHIN
16450-RNA-A01
View Specs
SolenoidKeihin Multi-Point Programmed Fuel Injection (PGM-FI / MPI, 4 bar)Euro 56
KEIHIN 16450-RNA-A01 Multi-Point Fuel Injector Honda Civic 8 9 HR-V 1.8L i-VTEC R18A1 R18Z1 R18Z9 FJ786
Engine Platform:Honda 1.8L i-VTEC SOHC R18A1 / R18Z1 / R18Z9 →
OE REFERENCE
16450-RNA-J01, FJ786, 842-12328CONTROL VALVE
-NOZZLE
-RAIL PRESSURE
3.5 barEMISSIONEuro 5 / Euro 6
WARRANTY12 Months
03
Technical Specifications
| Specification | Value |
|---|---|
| part_number | 16450-RNA-A01 |
| oem_reference | 16450-RNA-A01 |
| manufacturer | KEIHIN |
| system_type | Fuel Injector |
| pressure_rating | 3.5 bar (50 psi) |
| operating_temperature | -40°C to +135°C |
| flange_mount_torque | 12 N-m (9 lb-ft) |
| high_pressure_line_torque | 12 N-m (9 lb-ft) |
| diagnostic_dtc | P0171, P0300, P0301, P0172 |
| Operating PressureCore Spec |
04
Installation Tips
- Depressurize the fuel system completely via diagnostic scan tool or by removing the fuel pump fuse prior to line disassembly.
- Clean all surrounding bracket areas thoroughly using residue-free brake cleaner to prevent abrasive particulate ingress.
- Inspect the mechanical camshaft lobe and roller follower or clean injector bore seating surfaces before hardware alignment.
- Install component using fresh factory O-rings or Teflon combustion chamber seals lubricated only with clean motor oil.
- Torque mounting flange fasteners in alternating increments to 12 N-m (9 lb-ft).
- Torque high-pressure hydraulic tube fittings using a calibrated flare nut wrench to 12 N-m (9 lb-ft).
- Prime low-pressure fuel circuit, cycle ignition key 3-4 times, and inspect for high-pressure hydraulic leaks before road test.
Tips & Warnings:
- Always replace single-use high-pressure metal fuel lines and micro-filter seals whenever disconnected.
- Verify camshaft driving lobe surfaces for scoring or flat spots before installing any mechanical pump.
- Reset long-term and short-term fuel trim adaptations via OBD-II diagnostic scanner after physical replacement.
05
Diagnostic Trouble Codes & Fault Protocols
Common diagnostic trouble codes (DTCs) triggered when this common rail injector experiences wear, circuit faults, or calibration drift:
P0087Critical
Fuel Rail / System Pressure Too Low
Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.
P0201 - P0208High
Injector Circuit Malfunction / Open Circuit
Solenoid coil resistance drift (0.2-0.5 Ω) or piezo stack degradation triggers driver stage shutdown on affected cylinders.
P0300 / P0301+High
Cylinder Misfire & Balancing Deviation
Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.
P0088High
Fuel Rail / System Pressure Too High
Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.
WORKSHOP PROTOCOLS
Technical Diagnostic & Service Protocols
Authoritative field procedures, diagnostic testing thresholds, and service SOPs for this assembly.
Workshop Diagnostic Protocol
Read Technical ProtocolCommon Rail Injector Back-Leak Testing Guide
COMMON RAIL DIESEL WORKSHOP SOP
Read Technical ProtocolStuck Injector Removal & Carbon Cleaning SOP | FuelPartsDB
ASSEMBLY & INSTALLATION PROTOCOL
Read Technical Protocol