Invent Jetronic installation manual
Installation of injector rail
Remove mechanical injectors with distributor
Remove upper half of intake manifold.
Remove throttle dampfer (under throttle assembly)
Remove MAF air plate. Secure moving part with plastic strap.
Install distributor cap using sealant
Cut start injector mount which prevents installing fuel rail.
Seal start injector with a sealant.
Install injector inserts
Install new injectors into inserts as deep as you can. Install fuel rail.
Drill holes for screws and fasten fuel rail.
Install fuel line.
Install idle valve
Place wire harness and connect it to injectors.
ECU installation
ECU is dust and splashproof. It cannot withstand continuous water contact or high pressure cleaning.
Do not install ECU with cable upwards. In this case, water and moisture will floow off the cable onto ECU.
Remove old ECU.
Connect injectors’ 12V power line in parallel to existing wire.
Cut existing wires to connect injector 1..5.
2.3L engine (35-pin connector) | 2.0L engine (25-pin connector) |
Injectors power line (12V) - 14 Injector 1 - 12 Injector 2 - 9 Injector 3 - 2 Injector 4 - 22 Injector 5 - 20 K-line - 11 Ground - 18 и 35 EXT signal - 33 If some of required wire isn’t availabe, you can pull any of following wires: 19,24,25,29 | Injectors power line (12V) - 1 Injector 1 - 24 Injector 2 - 22 Injector 3 - 20 Injector 4 - 19 Injector 5 - 7 K-line - 16 Ground - 15 и 17 EXT signal - 15 |
In some stock harness EXT signal is wired to air conditioner relay.
If you don’t have OBD2 connector in car, you can simply connect 3 wires to the OBD adapter (Ground, 12V, KLine)
4 - ground
7 - К-line
16 - 12V
Preparing distributor
FAQ
Q: Is it mandatory?
A: No - if youre using petrol, you can use batch injection mode. Yes - if you’re using LPG.
Q: My distributor is different. What should I do?
A: Manual is written in such way that you should get proper result on any distibutor
Manual
Find spark plug wire of first cylinder
Mark this wire on distributor housing
Remove distributor cap
Turn crankshaft until rotor meet our mark
Remove rotor and protective cap
Mark shutter gap which is next to the hall sensor
Cut a vane by 2.5mm exactly
Warning! If you will cut more than 2.5mm, ignition control unit will malfunction. If you will cut less - ECU will not be able to sync properly.
Additional information
Invent-Jetronic 2.3L pinout
2 - Inj.3 3 - CLT 4 - IAT+ 5 - IAT- 7 - Lambda 8 - GND 9 - Inj.2 11 - K-Line 12 - Inj.1 13 - Check Engine 14 - 12V power 17 - Idle 18 - GND | 20 - Inj.5 21 - MAF emulator output 22 - Inj.4 23 - TPS 26 - TPS 5V power 28 - Idle switch 30 - Hall sensor 31 - Full load switch 33 - EXT input (AC input if available) 35 - GND |
Invent-Jetronic 2.0L pinout
1 - 12V power 2 - GND 3 - Idle ch.1 4 - Idle ch.2 5 - Full load switch 7 - Inj.5 8 - Lambda 10 - IAT+ 12 - IAT- 13 - Idle switch | 14 - TPS 5V power 15 - EXT input (AC input if available) 16 - К-Line 17 - GND 18 - TPS 19 - Inj.4 20 - Inj.3 21 - CLT 22 - Inj.2 24 - Inj.1 25 - Hall sensor |
Stock 2.3 schematic
100- Injection ECU 103- Ignition ECU 16 - Start inj 6 – Idle valve 2 – EVAP valve 84 – Dashboard 80 – AC 36 – Throttle switches 37 – Lambda 21 – Fuel pressure regulator | 42 – CLT 50 – MAF 51 – Atmospheric pressure sensor 40 – Hall sensor 45 – Knock sensor 91 – Fuel pump relay 3 – Fuel pump 10 – Ignition coil switch 11 – Ignition coil |
Stock 2.0 schematic
