Fuel Pressure Sensor: Installation

When replacing the fuel injector assembly with a new one

CAUTION: When replacing the fuel injector assembly, select the assembly with the same flow rate stratification number.

NOTE: The flow rate stratification numbers of all 4 cylinders are identical.

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(A)	Flow rate stratification number
(B)	QR code

When reusing the fuel injector
1. Prepare the fuel injector assembly using the following new parts. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>FUEL INJECTOR>REPLACEMENT .
  - Stopper ring
  - O-ring seal
  - Back-up ring
  - Fuel injector insulator
  - Fuel injector ring
  - Fuel injector seal
Install the fuel injector holder.

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Align the protrusion of the fuel injector holder to the anti-rotation slot of the fuel injector pipe RH, and install the fuel injector straight to the fuel injector pipe RH.

CAUTION:

Always use a new fuel injector pipe RH.
Degrease inside of the fuel injector insertion hole of the fuel injector pipe.
Check the inside of the fuel injector insertion hole of the fuel injector pipe for foreign materials or damage.
Be careful not to allow gasoline to contact with the fuel injector seal and the inside of the mounting hole.
Apply liquid paraffin to the O-ring seal and install it.
Be careful not to twist the O-ring seal.
To prevent damage to the O-ring seal, insert the part straight along the fuel injector insertion axis without tilting it and avoid removing and inserting the part again.
To prevent the tip of the fuel injector from bending, do not apply force to the fuel injector tip.
Check that the tip of the fuel injector has no bend or damage.
Make sure there is no gap between the fuel injector pipe and the fuel injector holder.
Make sure there is no gap between the fuel injector and the fuel injector holder.

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(A)	Protrusion portion
(B)	Anti-rotation slot
(C)	No gap allowed.

Insert the fuel injector pipe RH and fuel injector as a single unit into the cylinder head, and align their positions. Then, evenly press the sections (A) and (B).
CAUTION:
- When installing, apply liquid paraffin to the fuel injector seal.
- In order to prevent damaging the O-ring seal, do not install the fuel injector pipe and fuel injector by tilting them toward the cylinder head.
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Tighten the bolts which hold the fuel injector pipe RH.
Tightening torque:

19 N.m (1.9 kgf-m, 14.0 ft-lb)

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Temporarily tighten the fuel pressure sensor until it cannot be turned by hand.
CAUTION: Always use a new fuel pressure sensor.
Tighten the fuel pressure sensor.
CAUTION:
- Be careful not to spill oil on the screw sections of the fuel pressure sensor and the fuel injector pipe RH.
- Be careful not to let foreign matter enter into the fuel pressure sensor during installation.
- The sensor should be installed perpendicularly to the fuel pressure sensor's threaded hole of the fuel injector pipe RH, and tightened to the specified torque.
- Do not recheck the tightening torque after tightening the fuel pressure sensor with specified torque.
Tightening torque:

46 N.m (4.7 kgf-m, 33.9 ft-lb)

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Connect the connector (A) and connector (B).

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Install the high-pressure fuel delivery pipe assembly. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>HIGH PRESSURE FUEL DELIVERY PIPE>INSTALLATION>HIGH-PRESSURE FUEL DELIVERY PIPE ASSEMBLY .
Install the air intake boot. Ref. to INTAKE (INDUCTION) (H4DO)>AIR INTAKE BOOT>INSTALLATION .
Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .