Robbedoes,I am sorry for putting you in the wrong direction, i did that one time to check if all injectors were squirting (wide open throttle) but indeed you won't be able to see if the injection timing matches.
I do think you should verify if the injectors are wired correctly. You can pull all injector connectors (number them with tape) off, pull the ecu connector off (ECU pin 5 and 22 are the injectors pins, see manual). Get a multimeter set it to resistance (Ohm) or the buzzer function if it has it. Cyl 1+4 should be connected to pin 22. Cyl 2+3 should be connected to pin 5. And offcourse injector cyl 1 should be connected to cyl 4 and 2 to 3. (This is all based on the Brutale manual but it should be the same for an F4 with this ECU.)
Thanks very much for your input, I had a look through my manual but couldn't find much on this subject, so I took off the ECU plug and you were 100% correct about the leads.
Here are a couple of pics, I hope it explains this for anyone else that's not sure about their leads.
My findings are for F4 750 2001, so other models of that era might change.
204.6 KB Views: 80
158 KB Views: 77