User Login    
 + Register
  • Main navigation
Login
Username:

Password:


Lost Password?

Register now!
Fast Search
Slow Search
Google Ad


[Datsun 1200 encyclopedia]

EGI

Revision as of 07:11, 4 July 2015; view current revision
<-Older revision | Newer revision->

Datsun 1200 encyclopedia | Recent changes | Edit this page | Page history | Switch to MediaWiki mode

Printable version | Disclaimers | Privacy policy | Current revision
Categories: Fuel System | Fuel Injection

Some 1979-1982 Datsun B310s in Asia markets came with an OEM (factory) EFI system. Nissan called it "EGI" -- Electronic Gasoline Injection (日産 EGI). This is the "rare as" A14E Injection motor (インジェクション エンジン). At 92 horsepower it was far superior to the carbureted 80 hp A14/A15, in fact this was the most powerful A engine offered by Nissan, with more horsepower than the twin-carb GX Engine.


Contents

Overview

92 PS @ 6000 rpm
A14E - 11.7 kgm @ 3600 rpm (85 ft lb)
A15E - 12.3 kgm @ 3600 rpm (89 ft lb)
Compression Ratio: 9.0
Regular unleaded gasoline 

Beauty Item

quote:
a friend of mine has a system that came on the A14 in the [N10?] M10 Pulsars (very first ones). The set up he got came from Singapore

B310 TV Commercial on U-Tube

The A-series fuel injected engine came in:

  • 7809-8102 N10 A14E Langley (Pulsar) -- Asian markets
  • 1978-up Feb - B310 A14E & A15E Sunny 1400SGX-E Coupe -- Asian markets

174_4bd379abb06dc.jpg A14E manifold

A14E was available until October 1980. It was replaced by A15E in November 1980. The A15E is nearly identical but features a dual-outlet exhaust manifold.

A14 EFI manifold

quote:

at SSS as I remember at one stage they had import carbie A15 engines for round $600 and injected A14 and A15 for around $800
...
Reportedly, Nepean Sports classics in Castlereagh NSW was selling import motors. carlos' son ran one. These are fairly sought after by the rally guys as the narrow runners provide torque and the length also good top end, too small for a big A15 though.

These possibly came in later model Nissan Vanettes, the reason they seem rare is both my manifolds broke across the bottom of no's 1 & 2 inlet runner. Plus it suffers from reversion with a big cam.

These were also available in asian markets (Japan, Singapore, etc).

quote:
  • A14 EGI = HB310 (1978-1980) Type-GX & SGX
  • A15 EGI = PB310 (1980-1981) Type-GX & SGX
As for the name in Japan, Nissan calls EGI and Toyota EFI. Although the EGI system should excel Carburettors in the performance, old EGI is inferior to Carburettors.

A series injection manifold

Discussions:
* My fuel injection system arrived
* manifolds

B310 factory setup (less air intake tube):

  • This car is missing the air induction piping that goes across the radiator (see 200SX EFI for layout and diagrams)
  • As you can see here, the setup is nearly identical to 1980 200SX EFI system.

B310 Engine
22795.jpg

22796.jpg


B310 Factory Setup
2408.jpg 2409.jpg 2410.jpg 2411.jpg th_A14E_1.jpg

Service Manual

A14 Electronic Gasoline Injection Service Manual
20014.jpg

Since this electronic fuel injection system directly measures the air flow rate, it is called the "L-Jetronic system", the "L" being taken from the German "Luft" (air).

Datsun model series S30 factory service manual

A detailed overview of the EGI system is in Service Bulletin No. 350 "Introduction of Datsun Sunny 1400 GX-E SGX-E Model" (Japanese language)
25716.jpg (see GX-E)


This Hitachi EGI is explained in the English-language factory Service Manual for the Datsun 280Z (this manual is easier to get than the Japanese-only B310/N10 service manuals).
th_1975-76Datsun280ZORM.jpg

Datsun 280Z Service Manual
SECTION EF
ENGINE FUEL
Electronic Fuel Injection System Construction and Function --- page EF-3

EF-3 Features
EF-3 Electronic Fuel Injection System Operation
EF-6 Electronic Control System
EF-8 Fuel Injection Pulse
EF-12 EFI System Component Parts
EF-20 Trouble Diagnoses
EF-20 Inspection
* EF-20 Description
* EF-21 Continuity Check
* EF-30 Checking Functional Parts
* EF-40 Removal and Installation

Performance

This factory Nissan setup was designed for typical mass-market street performance. Expect better low-speed horsepower performance than a stock DCH306 carburetor (due to the longer runners), AND increased peak horsepower.

Quite a large horsepower difference:


1980/11/28
ドアセダン1500 SGX-E
エンジン: A15E型 
最高出力 PS/rpm: 92/6000 
最大トルク Kgm/rpm: 12.3/3600 
クーペ1400 RS-E
形式 A14E型 
最高出力 PS/rpm 92/6400 
最大トルク Kgm/rpm 11.7/3600 
http://nms.nissan.co.jp/contents/product/SUNNY/spec/04/04_112.html

However, it is not a racing system. In a heavily modified engine, carburetion has more potential:

Quote
A factory EFI setup imported from Japan was tried, and found to be much smoother, but ... restrictive above 6000rpm when used with the [racing] cam.

large photo

Cylinder Head

H92 cylinder head with standard A14-size valves (37/30 mm), wet intake manifold but with dual-valve springs like a GX head.

Manifolds

21833.jpg

14035-H9201 GASKET-MANIFOLD TO CYLINDER HEAD A14E, A15E
* has notches at the top for the injectors

You can use a standard A14 wet gasket (for manifold with water ports) and notch it.
album

Exhaust

The exhaust manifolds have not a Heat Riser valve, and do not fasten to the bottom of the intake manifold like the A12GX manifold.

A14E has a free-flowing single outlet exhaust manifold. Certain other late model A-series engines are similar, but the A14E manifold is unique.
A14E manifold

A15E has a twin-outlet exhaust which looks nearly identical to A12GX Engine
A15E exhaust

14004-H9200 MANIFOLD-EXHAUST A14E
* Single outlet (A14-style, uses regular A14 Exhaust piping)
* 1.5 exhaust. The inner portion is about 1-5/8 max diameter
21847.jpg
* dual-plane design
14004-H9260 MANIFOLD-EXHAUST A15E
* Dual outlet (A12GX-style)
* 20711-H9200 GASKET-EXHAUST
* 20020-H9200 TUBE ASSY-EXHAUST FRONT [to convertor] NICHIRA A15E F5
* 20020-H9210 TUBE ASSY-EXHAUST FRONT [to convertor] NICHIRA A15E F4
* 20602-P6700 NUT [for pipe to manifold] (3) $4.53 USD
** replaced 20602-F1700 NUT 
Sheet-metal cover over the manifold:
16590-H9201 COVER ASSY-EXHAUST MANIFOLD A14E
16590-H9260 COVER ASSY-EXHAUST MANIFOLD A15E

The tube is for EGR, and bolts to the bottom of the intake manifold
21832.jpg

Intake

21849.jpg

Port size
* 28x32 mm (medium oval) with injection cutout of extending up to 40mm
* compare to standard A14: 28x34
21848.jpg
* Port sizes on the same manifold vary a bit

21834.jpg

14003-H9200 MANIFOLD-INTAKE A14E
14003-H9254 MANIFOLD-INTAKE A15E
* 08223-84510 STUD $1.15 USD
* 08223-84010 STUD $0.78 USD

3684.jpg

Be sure to port match, as ports can vary.
Black shows the gasket opening.
port matching

On the bottom of the intake manifold is the water hose. It connects to the front block water tube.
photo
Water hose is "E" in this photo

14052-H9200 HOSE-WATER 
* 08723-12000 CLAMP (2)

8104.jpg

Throttle Body

parts

16118-H9200 CHAMBER ASSY-THROTTLE A14E -7909 (to Sep. 1979)
16118-H9201 CHAMBER ASSY-THROTTLE A14E 7909- (from 9 1979)
16118-H9260 CHAMBER ASSY-THROTTLE A15E
* 16122-N1400 BOLT-CHAMBER A14E (4)
** 08915-13800 WASHER (4)
16175-H9200 GASKET-THROTTLE RETURN [Throttle body]
22620-W7060 SENSOR ASSY-ACCELE [throttle angle sensor]
* 08310-40814 SCREW (2)

throttle chamber

Much larger than stock, a CA20 throttle body will bolt on:
3685.jpg 1877.jpg

On bottom of throttle body:

16484-H9200 VALVE-SERVO (FICD)
* 22156-85056 WASHER-SPRING
* 16485-U9800 SCREW
* 16599-N3600 CAP-CONNECTOR [for non-Aircon cars]

throttle linkage

16160-H9200 SPRING-THROTTLE RETURN
16182-H7820 DASHPOT ASSY TO 8004
16258-H9200 BRACKET-DASHPOT
16376-H9200 BRACKET-ACCEL CABLE
* 08360-61214 SCREW

Block Ventilation (PCV)

The crankcase is ventilated on top by a breather hose from the rocker cover to the fitting on the throttle body. The bottom of the block is positively vented as usual by the PCV valve.

Rocker Cover Breather

The rocker cover connects to the top fitting on the throttle body.

13264-H9200 COVER ASSY-VALVE ROCKER -7909 [Gold Top]
13264-H9201 COVER ASSY-VALVE ROCKER 7910- [Gold Top]

The PCV bolts to the back end of the plenum, and connects by hose down to the normal block breather tube.
21850.jpg

PCV Hose Assy - Lower Hose goes from Block Breather Tube to the Valve screwed into rear of plenum
EGI blowby system

ECU Control

The ECU is located in the left kick panel area of the B310, in the passenger compartment, away from dampness and vibration.

22611-H9201 UNIT ASSY-CNTROL A14E -7806 <> 22611-H9202
22611-H9202 UNIT ASSY-CNTROL A14E 7807-8010
22611-H9265 UNIT ASSY-CONTROL A15E
th_20100829190514DSC00751x.jpg

The factory ECU is a variation of Bosch L-Jetronic (air-Jetronic), thus it requires a matching Airflow Meter. This air measuring meter allows the ECU to run well automatically on different size engines.

You can use other Datsun ECU such as L18E or L20Z if you use its matching AFM. Because it is not an MAF system (mass air flow) the AFM needs to match the calibration in the ECU.

You can run an aftermarket ECU without an AFM as long as the ECU is tuned for the specific engine. MegaSquirt is the DYI ECU of choice. Others have successfully run Haltech, Wolftech, Link, or AEM ECUs with the EGI manifold. Adding a MAP sensor or potentiometer-type TPS is required if an air meter (AFM or MAF) is not used. This is called a speed-density airflow calculation mode.

Air Cleaner and Flow Meter

The Datsun ECU calculates the air mass by metering of airflow and air temperature (warm air weighs less than cold air). So using the correct AFM is important.

This is unlike the newer Mass Air Flow sensors which indicate air mass directly. The Datsun ECU does not work with Mass Airflow sensors. Bosch LH-Jetronic used a MAF sensor - the H is for Hitzdraht (Hotwire) which is part of the MAF technology.

th_C16-10-01_d.jpg

The air cleaner and flow meter is bolted to the left front corner in the B310.

full

Air Cleaner Element, Air Flow Meter, and Hose
full

22680-H9200 METER ASSY-AIR FLOW
* 08363-62038 BOLT (4) [fixing air cleaner L-section to flow meter]
* 22682-H9200 BRACKET-AIR FLOW METER
** 08363-61238 BOLT
** 08360-81414 BOLT
16578-H9200 HOSE ASSY-AIR DUCT [from flow meter to throttle body]
* 08723-19000 CLAMP
* 08723-17300 CLAMP

th_airflow_meter.jpg th_22680-H9200.jpg th_airflow_meter_.jpg

Air Duct
 full
62860-H9201 DUCT AIR [goes across radiator, above the engine fan]
 full
H63-03-1_E2.jpg
Air Cleaner
16500-H9200 CLEANER ASSY-AIR
* 16546-N4210 Filter Air $9.58 USD
  * replaced 16546-N4200 ELEMENT ASSY
* 16536-N4201 PACKING [air cleaner housing gasket] $13.10 USD
* 16516-N4200 BOLT-CENTER [wing nut] [fixing top cover]
*  08363-61638 BOLT [fixing bottom pan]
Air Induction Valve
14856-H9200 VALVE ASSY-RELIEF WITH CASE
* includes 14845-N8000 VALVE ASSY-AIR INDUCE
* 16597-G2100 FILTER ASSY [for air induction valve] $12.12 USD
* 08363-61638 BOLT (2) [fixing L-section to fender]
* 16558-N6910 GASKET [fixing air cleaner bottom to L-section] $3.55 USD
** 08310-51614 BOLT (10)

Idle Air Bypass

Nissan calls this the Air Regulator. The ECU turns this on to raise the idle speed for cold starts (fast idle).

Air Regulator Hose A goes to throttle body

Regulator Hose B goes to intake manifold

22660-H9205 REGULATOR-AIR ASSY
* 08710-61622 BOLT (2)
14060-H9200 HOSE-3 WAY CONNECTOR TO AIR REGULATOR
* 16439-N4202 CLAMP-HOSE
* 08723-12000 CLAMP
14061-H9200 HOSE-AIR REGULATOR TO CONNECTOR
* 16439-N4202 CLAMP-HOSE
* 08723-12000 CLAMP
14875-A7700 CONNECTOR-VACUUM HOSE

Air Regulator Parts

Sensors

Sensors for the ECU in the factory configuration include:

* Throttle Position Sensor
* Coolant temperature
* Intake air temperature
* Oxygen sensor from July 1981. 
  Earlier B310s did not have a lambda sensor

Throttle Position Sensor (TPS): Black box bolts to side of throttle body. Nissan calls this the "Throttle Valve Switch".
#22620 in this diagram, #J in the photo
2950.jpg 21838.jpg

Coolant temperature. Nissan calls this the Temperature Sensor
#B in this diagram, on bottom of intake manifold
21839.jpg

B: electric two-pin switch (rearward upper)
* [Temperature_Gauge#ECU_TEMPERATURE_SENSOR|22630-N4200] SENSOR ASSY-TEMPERATURE $29.10 USD
th_22630-N4200.jpg

Intake air temperature (IAT) is located in the flow meter
Flow meter at extreme bottom right
th_Image032-11.jpg

Temperature Gauge sensor on cylinder is the standard type (same as Datsun 1200). It is not used by the factory ECU.

Oil pressure sensor is the standard one to operate the gauge light. It is not connected to the ECU. However, it is connected to the fuel pump relay (see Fuel Pump section below).

Throttle Valve Switch

Black box bolts to side of throttle body.
5S5295_a.jpg th_5S5295.jpg


22620-W7060 Accelerator Sensor

Also called:
Throttle Position Sensor (TPS)
throttle angle sensor
Accelerator Sensor
Throttle Valve Switch

TPS is #22620 in this diagram
full

TPS is #J in the photo
full

The Throttle Valve Switch has two contacts, one for idle position sense, and one for full-throttle position sense. It is not a potentiometer-style TPS. It can be adjusted to show idle position (spec is under 1400 rpm).

Idle switch check

  1. Disconnect ground/earth lead from battery
  2. Disconnect connector at Throttle Valve Switch
  3. Connect ohmmeter to pins 2 & 18. Continuity should appear at idle position, and no continuity at 4 degrees throttle opening

Full throttle switch check

  1. Disconnect ground/earth lead from battery
  2. Disconnect connector at Throttle Valve Switch
  3. Connect ohmmeter to pins 3 & 18. Gradually open the throttle. Continuity should appear at 34 degrees throttle opening and continue through 90 degrees.

Insulation Check

  1. Disconnect ground/earth lead from battery
  2. Disconnect connector at Throttle Valve Switch
  3. Put black ohmmeter lead on metal bolting tabs of Throttle Valve Switch (or bare engine earth/ground). # Put red lead on terminal 2. No continuity should appear between Throttle Valve Switch housing metal and terminal 2. Meter should show infinite resistance.
  4. Repeat for terminals 3 and 18 and earth/ground.


Adjustment

  1. Ensure the gap between idle stopper screw and lever is 1.3 mm
  2. Loosen two bolts
  3. Rotate Throttle Valve Switch until continuity between contact 2 & 18 disappear
  4. Tighten bolts

Alternative Adjustment

  1. Run engine at 1400 RPM
  2. Pop the plastic cover off the Throttle Valve Switch
  3. Loosen two bolts
  4. Rotate Throttle Valve Switch until points just open
  5. Tighten bolts

full

Fuel System

Dropping Resistor

The dropping resistor is located in the left hood ledge area of the B310, forward of the strut.

Also see Injectors#Dropping Resistor
22698-N4202 RESISTOR-DROPPING -0780 $60.65 USD
22698-W1401 RESISTOR-DROPPING 0880- <>22698-W1411 <5> 22698-D0300
01451-00171 SCREW (2)

22698-N4202 (JECS A15-000571)
21853.jpg

Spec
10 watt 
7 ohms (6.8 ohm nominal)
N4202 8-wire connector
W1401 4-resistor pack???
22698-N4202 is used by:
* EUROPE
  S130 280ZX L28E engine
  S110 Silvia L18E 
* USA
  S130 280ZX L28E engine
  S110 200SX Z20E
* JAPAN
  B310 A14E 
  250 Y44E V8 Nissan 
  S110 Silvia Z18E+Z20E
Isuzu Trooper 2.6 4ZE1
22698-W1401 source:
* USA
  Pulsar NX 1983-1985 E15T
  S110 200SX Z20E USA
  N12 Pulsar E15ET USA
* EUROPE
  910 Bluebird Z20E
  N12 Cherry E15ET
* JAPAN
  K10.3HB.T 
  910 Bluebird (Z18E#+Z20E) 
  B11 Sunny E15E+E15E
  N12 Pulsar E15T
  R30 Skyline (Z20E+FJ20E) 
  S110 Silvia/Gazelle (Z18E+Z20E+FJ20)

Injectors

Also see Injectors
* Top Feed
* JECS A46-000001
* Green top
* 2.4 ohms (low impedance
* 182.9 g/m heptane @ 3 bar
* 188 cc/minute (good for up to 115 HP)

Injector Assembly

  • 16603-N7616 INJECTOR $133.33 USD
    BOSCH 0 280 150 166
    • JAGUAR EAC1851
    • includes:
      • 16449-Y8000 HOSE-INJECTOR L=53 -7909 $14.23 USD
      • 16604-N7615 HOSE-INJECTOR 7910- $14.82 USD
      • 16439-53A00 CLAMP-HOSE $2.38 USD
        • replaced 16439-N4710
    • Replaced:
    • 16603-Y8005 INJECTOR ASSY -7804 L=53
    • 16603-N7600 INJECTOR ASSY 7805-7909 JECS L=51
    • 16603-N7610 INJECTOR ASSY 7910- DKC L=51
    • 16603-N7660 INJECTOR ASSY 7910- BOSCH L=51
    • 16603-V0100 INJECTOR ASSY 7910- JECS L=51


  • 16612-N8500 HOLDER-INJECTOR [lower] 7910- $6.33 USD
    • replaced 16612-N4200 HOLDER-INJECTOR -7909
  • 16610-N1400 HOLDER-INJECTOR U $7.22 USD
    • 08310-53012 SCREW
    • 08915-13510 WASHER
    • 16635-N1400 RUBBER-INSULATOR INJECTOR $2.22 USD
    • 16636-N1400 RUBBER-INSULATOR INJECTOR $2.22 USD

Fuel Piping

The factory fuel-rail is a brazed ring. The top of the ring supplies the injectors. Fuel enters the bottom center of the ring.

Fuel outlet is from a Pressure Regulator bolted to the ring. It is attached to intake vacuum, and lets a more or less fuel back to the oulet pipe (Rising-Rate regulator).
939.jpg
This photo shows a simplied vacuum connection to the Regulator.

21838.jpg

  • 17520-H9203 TUBE ASSY-FUEL
    • 08360-81412 BOLT (2)
    • 08915-13810 WASHER (2)
    • 16443-N7615 HOSE FUEL L=85
    • 16440-U8715 TUBE-FUEL RETURN
  • M: Fuel inlet
  • N: Fuel outlet
  • O: 22660-N4700 REGULATOR ASSY-PRESSURE [fuel]
    • 16443-N4710 HOSE-FUEL (2)
      • 16439-N4710 CLAMP-HOSE (4)
    • 02141-31700 TUBE-VACUUM PRESSURE REGULATOR -7909 L=31 S/# B2318-73002
    • 22323-W7504 TUBE-VACUUM PRESSURE REGULATOR 7910- L=170 S/# B2320-Y4000
    • 01552-00481 CLAMP-EGI HARNESS A15E
    • 24220-89985 CLAMP-EGI HARNESS A14E -7909
    • 22472-M7000 CLAMP-EGI HARNESS A14E 7910-

Fuel Pump

The nice thing about the factory system is that it uses an external fuel pump. This fits below the fuel tank in the B310, 280ZX or 200SX.

  • 43-64 psi Cut-off discharge pressure
  • 5.1 amps Design current, so use a relay (see wiring section)

280ZX pump and damper
21845.jpg

Fuel pressure (after fuel filter)

  • 30 psi at idle
  • 37 psi at Initial full throttle


Since the 1200 fuel tank is baffled only for carburetor, you might wish to fit a anti-swirl pot under the bonnet. Run a low pressure fuel pump to it. And the EFI pump from the pot to the filter & fuel rail. If you get a float-style pot you wouldn't even need to fit a return line to the 1200 tank.


Check valve fits between tank and pump.


High-flow fuel filter is under the bonnet.

  • 16400-00004 Fuel filter 280ZX $12.08 USD


17011-P7211 PUMP ASSY-FUEL $286.12 USD
* replaced 17011-N4205 PUMP ASSY-FUEL A15E 
* replaced 17011-Y8000 PUMP ASSY-FUEL A14E
17012-F2001 BRACKET-FUEL PUMP $25.70 USD
22675-N4205 Damper Diaphram $110.53 USD
* replaced 22675-N4200 DAMPER-FUEL
* 22676-H9200 BRACKET-FUEL DAMPER
16420-E0100 SPACER-FUEL PUMP [blank-off plate] $16.10 USD
* 00915-13610 WASHER (2)
* 08120-61210 BOLT (2)
motorfuelpumpblockoffZ20Z22.jpg Fuel Pump Blank
16400-Q0800 STRAINER ASSY-FUEL [fuel filter] $15.38 USD
* 16419-H9200 BRACKET ASSY-FUEL STRAINER
** 01461-00061 SCREW

Emission Controls

EGR

EGR is explained in the main article: EGR

EGR on the fuel injected A-engines concerns a large area on the bottom side of the inlet runners.
EGR block-off plate fitted

full | japanese

14711-H9200 PASSAGE-EGR -0709
14711-H9201 PASSAGE-EGR 7910-
* 14720-H9200 GASKET-EGR PASSAGE
** 08110-61262 BOLT
** 08120-61662 BOLT
** 08915-43610 WASHER
** 08915-13610 WASHER-LOCK
** 08911-10610 NUT

full | japanese

EGR VALVE
14710-M5961 VALVE ASSY-EGR CONTROL A14E -7909
14710-M7300 VALVE ASSY-EGR CONTROL A14E 7910-8010
14710-M7301 VALVE ASSY-EGR CONTROL A15E
* 14719-N3301 GASKET-EGR CUT VALVE

The exhaust manifold has the EGR tube which screws to EGR Passage.
full

14710-H9200 TUBE ASSY-EGR A14E -7812
14710-H9201 TUBE ASSY-EGR A14E 7901-
14710-H9260 TUBE ASSY-EGR A15E
14875-M2260 CONNECTOR-VACUUM STRAIGHT [fits in EGR passage, and connect to the tube]

full | japanese

EGR Switches

These switches are part of the EGR system and have no connection to the fuel injection control.

Water Temperature Switch is #A in this diagram
Thermal Vacuum Valve is #C in this diagram
full

  • Water Temperature electrical switch
  • 2-port thermal vacuum valve (TVV) closes when the engine is cold, so no vacuum can flow to the EGR valve. Result: EGR is OFF when engine is cold.

full

full

A: switch with bullet connectors
* 22120-H8900 SWITCH-TEMPERATURE WATER A14E -8010 $73.67 USD
* 22636-N4200 GASKET-WATER TEMPERATURE $1.07 USD
C: vacuum switch (rearward lower)
* 14890-U7800 VALVE-THERMAL VACUUM A15E 8011- $22.90 USD

full

Red: EGR Control vacuum
Pink: Fresh air
Blue: supplies fresh air to VVT for Vacuum Cut
Green: EGR vacuum port

VC (Vacuum-Cut) Solenoid is engaged depending on Water Temperature and Amplifier Speed Sensor
full | Japanese

VVT

Venturi Vacuum Transducer (V.V.T.) modifies the EGR vacuum signal. The VVT Valve takes venturi vacuum and exhaust manifold back pressure, and outputs the EGR signal. This systems has finer control over the EGR than earlier systems. The result is better engine running and drivability.

full | original

The VVT senses exhaust backpressure via the VVT Tube connected to the EGR exhaust passage
full | japanese

An on/off vacuum switch has an input of intake vacuum, and activates on the high vacuum during deceleration. The output is used cut to power to the vacuum switch valve.

14775-H9201 BRACKET-VVT VALVE -7909
14775-H9202 BRACKET-VVT VALVE 7910-7911
14775-H9203 BRACKET-VVT VALVE 7912- [large bracket]
14771-H9215 VALVE ASSY-VVT
* 14755-H9200 TUBE-PASSAGE TO BPT L=110 S/#B2318-N3300 [small rubber hose]
  BPT = Back Pressure Transducer (VVT is an advanced BPT)
* 14750-H9201 TUBE ASSY-VVT CONTROL [small metal pipe]
14956-H7206 VALVE ASSY-SOLENOID EGR CUT A15E
14957-H7200 BRACKET-VACUUM SWITCH -7911
* Late engines use combined large VVT/SOLENOID bracket

VVT/BPT valve location
full

EAI

Exhaust Air Induction is the stainless pipe on the engine. It doesn't affect performance and is a very simple system for cleaner burning air (less pollution). It is much simpler than the Air Induction of the carbureted B310.

For explanation, see main article: Exhaust Air Induction

Stainless pipe goes from valve box on Air Cleaner
full

Pipe goes to the Exhaust Manifold (bolts to boss on #1 runner)
full

full | Japanese

14821-H9200 PIPE ASSY-EAI A14E -7909
14821-H9201 PIPE ASSY-EAI A14E 7910-
14821-H9201 PIPE ASSY-EAI A15E
14861-H9200 HOSE AIR [connects to stainless pipe]
* 08723-13200 CLAMP (2)
14824-H9200 BRACKET ASSY-EAI PIPE -7909
14824-H9201 BRACKET ASSY-EAI PIPE 7910-
* 08360-61414 SCREW

When retrofitting into an older vehicle, simply remove the pipe and plug the openings.

Wiring

See main article: EGI Wiring

Photo Index

See main article: EGI Photo Index