Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 109

SP(STI)-6

Accelerator Pedal

SPEED CONTROL SYSTEMS

IGNITION

IG(STI)

Page

1.

General Description  ...................................................................................2

2.

Spark Plug ..................................................................................................4

3.

Ignition Coil  ................................................................................................7

IG(STI)-2

General Description

IGNITION

1. General Description

A: SPECIFICATION

B: COMPONENT

Item

Specifications

Ignition coil

Type

FK0368

Ignition system

Independent ignition coil

Manufacturer

Diamond Electric

Spark plug

Manufacturer and type

NGK: SILFR6A

Thread size (diameter, pitch, length)

mm

14, 1.25, 26.5

Spark plug gap

mm (in) Standard

0.7 — 0.8 (0.028 — 0.031)

Electrode

Iridium

(1)

Spark plug

(3)

Engine harness stay (#3 ignition 
coil side only)

Tightening torque: N·m (kgf-m, ft-lb)

(2)

Ignition coil

 

 

T1: 16 (1.6, 11.8)

 

 

T2: 21 (2.1, 15.5)

IG-02126

(1)

T2

T1

T2

(1)

(2)

(2)

T1

(3)

IG(STI)-3

General Description

IGNITION

C: CAUTION

• Prior to starting work, pay special attention to the following:

1. Always wear work clothes, a work cap, and protective shoes. Additionally, wear a helmet, protective

goggles, etc. if necessary.
2. Protect the vehicle using a seat cover, fender cover, etc.
3. Prepare the service tools, clean cloth, containers to catch grease and oil, etc.

• Vehicle components are extremely hot immediately after driving. Be wary of receiving burns from heated

parts.

• When performing a repair, identify the cause of trouble and avoid unnecessary removal, disassembly and

replacement.

• Before disconnecting connectors of sensors or units, be sure to disconnect the ground cable from battery.

• Always use the jack-up point when the shop jacks or rigid racks are used to support the vehicle.

• Remove contamination including dirt and corrosion before removal, installation, disassembly or assembly.

• Keep the removed parts in order and protect them from dust and dirt.

• All removed parts, if to be reused, should be reinstalled in the original positions with attention to the correct

directions, etc.

• Bolts, nuts and washers should be replaced with new parts as required.

• Be sure to tighten the fasteners including bolts and nuts to the specified torque.