Hello all:
I have an '06 BMW M3 and am trying to run smart coils from the engine computer, which was originally set-up with embedded IGBT's. Basically I removed all 6 IGBT's from the board and ran the smart coils corresponding 5v and logic ground wires to the base and emitter pads. The primary coil grounds are batched together and run to a common ground stud in the engine compartment. I also jumped all the collector pads to the common coil ground source as well. My intention was to try and fool the DME into thinking it's still running the stock set-up, but have been unable to get a clean start. I'll get an occasional "bump" when starting, but no sustained run.
I also hooked up my multimeter to the 5v signal and a common ground to see what the trigger voltage was, and I read between -0.92V to -11.28V. Needless to say my basic thinking is not enough to get my set-up running, so I'm seeking some guidance on how I could possibly get this to work? Any ideas? Thanks in advance for the assistance.
I have an '06 BMW M3 and am trying to run smart coils from the engine computer, which was originally set-up with embedded IGBT's. Basically I removed all 6 IGBT's from the board and ran the smart coils corresponding 5v and logic ground wires to the base and emitter pads. The primary coil grounds are batched together and run to a common ground stud in the engine compartment. I also jumped all the collector pads to the common coil ground source as well. My intention was to try and fool the DME into thinking it's still running the stock set-up, but have been unable to get a clean start. I'll get an occasional "bump" when starting, but no sustained run.
I also hooked up my multimeter to the 5v signal and a common ground to see what the trigger voltage was, and I read between -0.92V to -11.28V. Needless to say my basic thinking is not enough to get my set-up running, so I'm seeking some guidance on how I could possibly get this to work? Any ideas? Thanks in advance for the assistance.