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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. This injection system used Hitachi manifold with JECS electronics and BOSCH sensors. It was based on the BOSCH L-jetronicᵂ system.
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Overview
EGI fitted to Datsun 1200
92 PS @ 6000 rpm A14E -8010 11.7 kgm @ 3600 rpm (85 ft lb) A15E 8011- 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
SGX-E with EGI side stripe
A14E engine
92 PS (DIN horsepower)
Why, yes! you can turbo an EGI system
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
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.
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: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.
- A14 EGI = HB310 (1978-1980) Type-GX & SGX
- A15 EGI = PB310 (1980-1981) Type-GX & SGX
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
B310 Factory Setup
EGI with Turbo
Service Manual
A14 Electronic Gasoline Injection Service Manual
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)
(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).
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:
- A14E: 92 PS @ 6400 rpm, 11.7 kg-m @ 3600 rpm
- A14: 80 PS @ 6000 rpm, 10.2 kg-m @ 3600 rpm
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 11.7/3600Nissan product page
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
Apparently the EFI has less restriction than the stock single carburetor, as it frees up HP in the upper RPMs, with no loss of torque.
EGI is a win-win situation when compared to the stock carburetor - more power, more torque, although it may run a bit richer than the carburetor.
Both curves superimposed. Note increases above 4000 RPM
Block
11010-H9200 A14E 11010-H9260 A15E
Standard parts * Rods * Crank & pulley * A15 rings * bushings/bearings * flywheel
Piston
EGI used unique pistons
PISTON SET WITH PIN 12010-H9211 A14E -7909 12010-H9221 A14E 7910- <2,0> 12010-H9211 12010-H9261 A15E
RING SET-PISTON 12033-H9910 A14E 12033-H9800 A15E/A15S
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. Casting mark is 'H891'.
Camshaft
EGI engines use the same camshaft as twin-carb engines. It has the GX profile, but is made for the new (1974-up) engine style.
13001-H5700 CAMSHAFT [Typical use: Performance engine] * 248/256 duration .331 lift * JPN B210 A12T, A14T * JPN B310 A14E, A15E
Manifolds
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.
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.
A15E has a twin-outlet exhaust which looks nearly identical to A12GX Engine
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
* 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
Intake
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:
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 connects to the top fitting on the throttle body
(early A14E uses same rocker cover as regular A12 but in gold color)
13264-H9200 COVER ASSY-VALVE ROCKER -7909 [Gold Top, rear breather] 13264-H9201 COVER ASSY-VALVE ROCKER 7910- [Gold Top, front breather]
The PCV bolts to the back end of the plenum, and connects by hose down to the normal block breather tube.
PCV Hose Assy - Lower Hose goes from Block Breather Tube to the Valve screwed into rear of plenum
Early EGI engines - rocker cover with rear vent (early A14E)
Late EGI engines - rocker cover with front vent (from October 1979, A14E & A15E)
ECU Control
NOTE: For an alternative to the stock ECU, see EGI MegaSquirt
The ECU is located in the left kick panel area of the B310, in the passenger compartment, away from dampness and vibration. It is made by JECS.
Control Unit Assembly, engine ｺﾝﾄﾛ-ﾙ ﾕﾆﾂﾄ ｱﾂｾﾝﾌﾞﾘ-,ｴﾝｼﾞﾝ #22611-H9201 UNIT ASSY-CNTROL A14E -7806 <> 22611-H9202 #22611-H9202 UNIT ASSY-CNTROL A14E 7807-8010 22611-H9265 UNIT ASSY-CONTROL A15E
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.
if you use the matching AFM, you can use a different Datsun ECU such as the L18E or the L20Z ECU. Because it is not an MAF (mass air flow) system, 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-densityᴳ airflow calculation mode.
A11
Engine computer エンジンコンピューター
- Early: 1973-1980 analog
- Late: 1981-up digital with MCU (microcontroller CPU)
22611-H9201
The original A14E control unit. Early JECS A11 mainboard with single connector:
top row: 18 mail spade connectors (3? missing) bottom row: 17 male spade connectors
22611-H9201 UNIT ASSY-CNTROL A14E -7806
Compatible with the newer 22611-H9202.
22611-H9201 A11-000 401 8501 A14 JAPAN ELECTRONIC CONTROL SYSTEMS CO., LTD MADE IN JAPAN
22611-H9202
22611-H9202 UNIT ASSY-CNTROL A14E 7807-8010
For A14E, backwards compatible with #22611-H9201
Only for use with S53 year emissions (1978, 1979 and 1980 A14E).
Caution: Do not install this part on any vehicle other than those that comply with the S53 year [1978] exhaust gas regulations. If installed incorrectly, the part may be damaged.
The EGI control unit checker must be used with the dedicated adapter (EG1131 0100, EG1135 0100) for vehicles that comply with the 1978 exhaust gas regulations.
A11 ECU
Analog ECU (no microprocessor)
ECU model series A11 powered. Pins are different on the different models. A14E has all pins in place, but others are missing a few to many pins.
NOTE: 22611 part number is also used by JECS for Subaru
A11ᴳ main board S30 A11-000 000 L28 (no missing pins) A11-000 050 B310 22611-H9201 A11-000 401 A14 S110 22611-N8801 A11-000 590 L18 0679-0681 S130 22611-P8600 A11-000 428 L28MT 22611-P6505 A11-000 414 L20 (4 pins missing) A11-600 000 L28 810 A11-602 240 L24 S130 A11 000 050 L28 (no missing pins) A11-604 420 L28 (9 pins missing) A11-606 460 L28 A11-612 424 L28 A11-613 425 L28 A11-616 420 L28 (9 pins missing) A11-618 427 L28 (9 pins missing) A11-620 600 L28 (4 pins missing) A11-621 601 L28 A11-618 427 L28 (9 pins missing) C210 22611-Y7700 A11-000 480 L20 (5 pins missing) 200SX A11-609 571 A11-625 574 Z20
A11 CPU-based
Two smaller connectors. Used with O2 sensors.
N13 A11-A74 B54 78 910 22611-D5901 A11-A77 C67 82 L20 23710-82A00 A11-A68 B50 A11-B30 BA6 91 Sentra/Sunny A11-B22 B98 38 A11-690 B00 5222 70 1987 Sentra w/HD63A03XP CPU 720 22604-62W01 A16-606 037 720 22604-62W01 A16-609 040 1984-1986 22604-62W01 A16-618 049
SMALL AND MEDIUM CONNECTORS S130 A18-000 040 L28
Hitachi HD63A03XPᴳ microcontroller is based on Motorola 6800ᵂ.
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.
The air cleaner and flow meter is bolted to the left front corner in the B310.
Air Cleaner Element, Air Flow Meter, and Hose
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
POST Reportedly, the L-series AFM works with the A14E ECU. It is a larger diameter so may improve high-RPM breathing.
Air Duct62860-H9201 DUCT AIR [goes across radiator, above the engine fan]
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
Potential alternative parts * Fit unverified * Calibration unknown 22660-N4210 280Z auxiliary air regulator, 280ZX idle air control 22660-N6910 S110.Z20E RockAuto.com
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
Coolant temperature. Nissan calls this the Temperature Sensor
#B in this diagram, on bottom of intake manifold
22630-N4200 SENSOR ASSY-TEMPERATURE $29.10 USD
Intake air temperature (IAT) is located in the flow meter
Flow meter at extreme bottom right
Temperature Gauge sensor on cylinder head is the standard type (same as Datsun 1200). It is not used by the factory ECU, but is for the temperature gauge in the dashboard.
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 Relay 3).
Throttle Valve Switch
Throttle Position Sensor (TPS): Black box bolts to side of throttle body. Nissan calls this the "Throttle Valve Switch".
Black box bolts to side of throttle body.
22620-W7060 Accelerator Sensor
Also called: Throttle Position Sensor (TPS) throttle angle sensor Accelerator Sensor Throttle Valve Switch
TPS is #22620 in this diagram
TPS is #J in the photo
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
- Disconnect ground/earth lead from battery
- Disconnect connector at Throttle Valve Switch
- Connect ohmmeter to pins 2 & 18. Continuity should appear at idle position, and no continuity at 4 degrees throttle opening
Full throttle switch check
- Disconnect ground/earth lead from battery
- Disconnect connector at Throttle Valve Switch
- 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
- Disconnect ground/earth lead from battery
- Disconnect connector at Throttle Valve Switch
- 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.
- Repeat for terminals 3 and 18 and earth/ground.
Adjustment
- Ensure the gap between idle stopper screw and lever is 1.3 mm
- Loosen two bolts
- Rotate Throttle Valve Switch until continuity between contact 2 & 18 disappear
- Tighten bolts
Alternative Adjustment
- Run engine at 1400 RPM
- Pop the plastic cover off the Throttle Valve Switch
- Loosen two bolts
- Rotate Throttle Valve Switch until points just open
- Tighten bolts
Fuel System
Dropping Resistor
The dropping resistor is located in the left hood ledge area of the B310, forward of the strut.
22698-N4202 RESISTOR-DROPPING -0780 $60.65 USD 22698-W1401 RESISTOR-DROPPING 0880- <>22698-W1411 <5> 22698-D0300 01451-00171 SCREW (2)
Main article: Dropping Resistor includes * Specifications * Source vehicles (the same Resistor pack was used by many Nissans)
22698-N4202 (JECS A15-000571)
Injectors
See main article: Injectors#16603-N7616
Nissan 16603-N7616 GREEN JECS A46-000001 hose feed 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).
This photo shows a simplied vacuum connection to the Regulator.
- 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-
- 16443-N4710 HOSE-FUEL (2)
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
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)Fuel Pump Blank 16400-Q0800 STRAINER ASSY-FUEL [fuel filter] $15.38 USD * 16419-H9200 BRACKET ASSY-FUEL STRAINER ** 01461-00061 SCREW
Emission Controls
A14E and A15E used EGR and Exhaust Air Induction.
See Main Article: EGI emissions
Wiring
See main article: EGI Wiring
Builds/Feature Cars
See Main Article: frankthedolphintrainer
Photo Index
See main article: EGI Photo Index
