Stage 1 - Controlling injection
Due to signal split difficulties, I skipped Stage 0, and start to wire the car with this stage.
Harness
I have disassembled a harness from junkyard, not exactly the same as the original one, but it's from a '98 BMW, connectors seems usable, and have a lot of double-colored wires, relay connectors, fuse houses, etc. [Injector cables] can be used completely.
![[Injector cables]](http://quasar.dynaweb.hu/~lezsi/bmw/conversion/injharness.jpg){kind=link}
Note:
- for 3-pole AMP connectors I've found two types, [Code I] and [Code II]. They are not interchangeable.
- for 2-pole AMP connectors I've seen Code I only.
![[Code I]](http://quasar.dynaweb.hu/~lezsi/bmw/conversion/typ1.jpg){kind=link}
![[Code II]](http://quasar.dynaweb.hu/~lezsi/bmw/conversion/typ2.jpg){kind=link}
I had difficulties to live both (motronic and genboard) harnesses the same time, since there's no room to wire so much more things from engine bay to the glovebox (small hole on firewall, sealing fits). I removed sealing temporarily, this gives much larger hole in the firewall, but wires have a direct contact to somewhat sharp metal.
Since motronic has to go either in Stage 2, I decided to move the whole motronic harness and ecu to engine bay temporarily.
Genboard harness will go to the glovebox. I've checked that both motronic and econoseal connectors can be pushed over on the hole in firewall.
One small issue : there's a [3 pole connector] from main motronic conn. to instrument panel which is vital to work. It contains instrument panel signal (fuel consumption gauge), tacho signal, and ignition switch signal (to motronic!). I had connected ign.sw. signal, car is now running with motronic in engine bay.
![[3 pole connector]](http://quasar.dynaweb.hu/~lezsi/bmw/conversion/motronic_to_dashboard.jpg){kind=link}
Wiring is almost done.
Mechanical part
- WBO2 had to be installed to exhaust. Done
- EGT has to be installed to exhaust. (Maybe later)
- Split pressure hose to [ map sensor]. Done.
![[ map sensor]](http://quasar.dynaweb.hu/~lezsi/bmw/conversion/map_housing.jpg){kind=link}
Electrical part
- Need to split VR signal -maybe with a series cond to catch from motronic's in-port directly?
- Maybe motronic will be offended at disconnected sensor and inj. cables. We may need to simulate something? (I don't care about "check engine lights" or something, but it must work for ignition, idle air, etc.)
- Explore IAC control. Did some measurements, check at MembersPage/GergelyLezsak/IdleControl
Software'
Don't know much about it.
- For ignition I need to know 60-2 wheel's trigger position relative to TDC. Don't know it yet.