Hello, I got an problem with setting up trigger for M54B30 engine. I have set up all triggers (found first trigger tooth using strobe lamp).
For some strange reason ECU is firing 4 cylinders almost at the same time (check screen shot below). Its first time I have problem like this, I have already checked for voltage drops, different sensors, checked trigger for damage etc. - found nothing, maybe anyone could pinpoint potential issue - thx.
base v3.emub3 (65.4 KB)
scope_202642_1841_cams_seq.emubscp3 (519 Bytes)
scope_202642_1843_wastedspark_no_cams.emubscp3 (522 Bytes)
youre set for wasted spark thats one thing. if youre running sequential injection you should change that.i dont see reason to run wasted spark when you can ran everything what engine needs with number of outputs etc. but that depends on yours coil wiring. but if you have not touched that change it to sequential thats how engine is from stock.
well, the thing is I tried to run sequential and wasted spark and its all the same - doesnt work and still ECU is firing 4 cylinders at the same time, I have done all possible test with CAMs on and CAMs off and WS - and it would not work 
Ill send you photo of my trigger settings. Looks like youre loosing sync. Have you checked your crank if its also straight ? My friend had one time issue he had bad thrust bearing and one main bearing and crank was wobbling and loosing sync from trigger wheel
I could have made a mistake with 1st trigger tooth by 180 deg. so I have changed it, double checked with strobe lamp and found TDC on 44 tooth with 60deg ign angle - Set this up and nothing changes, still EMU is firing 4 cylinders at the end of second turn of crankshaft.
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Here are scope and LOG files
scope_202643_1259_first_trigg__tooth_44.emubscp3 (537 Bytes)
20260403_1330_crankingLOG.emublog3 (224.5 KB)
Ok. So i figured out the problem was within voltage supply from battery - I changed the battery for a new one and that solved all of my problems with trigger