Tutorial cum sa ai injectie in loc de carburator

Linkul anterior nu mai este valabil dar ACESTA da!

Am gasit ceva descriere despre sistemele de injectie L-Jetronic, LE-Jetronic si Motronic ce le diferentiaza.....mai ales intre L si LE-jetronic se face confuzie.....nici eu nu am stiut concret care este diferenta.
In acest PDF se refera la BMWuri dar tot Bosch lea facut si pe alea ....desi ca calitate or fi mai bune decat cele oferite pentru opel dar ... ii interesant!

daca cineva are asemenea documentatie(ceva mai complex,mai amanuntit decat cele din cartile service sau de intretinere) despre oricare sistem de injectie, rog sa ma contacteze PM ca am nevoie.


Ultima modificare facuta de AdamOpel la Lun 23 Apr, 2007 9:56 pm

Conversion to injection

This page contains some information about conversing carburetted Opel Manta/Ascona to Bosch LE-Jetronic injection. Information can be used also with L-Jetronic with minor changes.
Where to start? What do you need ?

Easiest way is to visit a some good junk yard where people understand basic things about Bosch's injection and can break injected car reasonable way and collect all needed parts for conversion.

* Intake manifold and it's components (injectors, throttle body)
* Air flow meter and it's rubber hoses
* Wiring harness (all relays)
* Thermostat housing
* Fuel pump
* Control box
* Exthaust manifold



Connections of electronics (LE-Jetronic):

1. Start injector
2. Thermo time switch
3. injectors
4. throttle valve switch
5. air flow meter
6. extra air valve
7. temperature sensor (water)
8. distributor
9. ignition coil
10. battery
11. wiring harness
12. car's wirings
13. control unit
14. connection to coil (negative)
15. center earth
16. control relay



Figures for gasoline lines. Yellow lines marks pressurized fuel, orange marks non-pressurized line back to tank. Hoses must be good quality and pressure tolerating stuff. A new pipe must be installed (diam. 8mm) from tank to engine room for pressurized fuel. Original pipe can be used for flow back to tank (if you are not serious tuner).



Fuel pump assemby. Upper arrow describes flow from tank (diam. 12mm) lower arrow means pressurized flow to injection system. Usually original tank for E-engine is not available so modifications are needed. Original location of this assembly is somewhere under luggage compartment but it is more wise to install it to luggage compartment and protect it with some metal shield. Outside the car's chassis is corrosion real problem...



Control relay



Wiring diagram 1.control plug 2.earth 3.temperature sensor 4.earth 5. extra air valve 6.throttle valve switch 7.air flow meter 8.thermo time switch 9.start injector 10.injector 11.battery 12.control relay 13.fuse of fuel pump 14.fuel pump
Special things in installing

Engine block has extra plug (hex) under exthaust manifold near cyl. 4. Remove that and put some suitable connector for water from heater.

Original fuel pump is useless and can be removed. Install a thick (5mm) steel plate over pumps hole.

Wiring diagrams don't show clear that green extra wire from control unit should be connected to negative of ignition coil.

Adjusting



Normally after installing engine starts and works. However if idling is poor, mixture and idle speed can be adjusted. Check all rubber hoses and connections before adjusting.

adjusting idle mixture with a hex key (clockwise = richer)



Adjust idle speed with a screwdriver and 15mm key (clockwise = lower speed)
Some data:

Fuel pressure: 2.3-2.7 bar
Idle speed: 850-900rpm (manual gearbox)
CO in exthaust: max 1%
Temperature sensor resistance: 15-30 deg.C 1.45 ... 3.3kohm, 80deg.C ...280-360ohm