No spark no fuel

[Jan]

Hi this is my first post and first time working on my 1993 K1100.

Little information before: I have a 1993 K1100 RS that I made into a cafe racer and decided to install the   Motogadget M-Unit I did all the wiring myself with the help on the OEM wiring diagram, I did NOT touch the Motronic unit or the harness.
After all the wiring is done I’m not getting spark/fuel injected, fuel pump works fine, the motronic unit is receiving power and delivering the power to the injectors and the coils, but at the moment of cranking the engine it doesn’t send the signal, I have power in all connectors as they should (I checked a lot of posts about injectors and coil problems) all my grounds are connected and the motronic case is grounded to the chassis. so my question is:


Is there any sensor that would prevent spark/fuel signal delivery? Like the HES, the Densit or, TPS?
I already have the stand switch and the clutch switch bypassed.

[Laitch]

What "the Densit", Jan—heat sink paste on the ignition output contacts?

Among other sources, interruption of the Hall sensor signal would definitely interfere with injection and spark, but so would having a dirty ignition output unit. Your "93 should have one of those. It's attached to the battery cradle. If its mating surfaces haven't been cleaned then smoothed with heat sink paste and its plug not clean, that could contribute to your difficulty.
From BMW's K1100 manual downloadable from a link at this page.


The Motronic 2.1/2.2 manual is downloadable from a link at this page.

[Jan]

Hey sorry the Densit would be the air temperature sensor I named it wrong, the ignition output unit I checked and made sure it had a good contact but I will try adding the paste, and I did notice my hall sensor was kinda rusted I ordered one already waiting for it to arrive.
Thank you,  I will keep you updated 🙏

[sooprvylyn]

I don't t come on here often, but I hooked up an m unit blue to my k1100 and have no problems with anything. I'm happy to send you my super clean wiring diagram if you want it. Best to shoot me a text at 818.562.0831, or if not in the US hmu at nick@zox.la and I'll send it. Also happy to chat on it. The only thing I couldn't seem to get working was the keyless start, but might be a conflict w my Samsung phone.

[sooprvylyn]

Btw, mine is also a 93 k1100rs