S50b30 M3T starting/cranking issue

Having a starting issue.

BMW S50B30 turbo running crank trigger only. has vanos deleted.

have a starting/cranking issue and a hassle getting it to idle properly with a 2pin idle valve. changed from a 3 pin idle valve.

1st issue to sort out is when cranking over it generally take 4-5 tries to start.

On a cranking log i see it gets a missfire of sorts, as in logs attached, you can see multiple cylinders fire/trigger around the same time but only for that instance. on occassion the engine backfires loudly like a shotgun.

Got the car running decently but needs more attention once issues resolved. Map attached.

Any replies welcome and appreciated.

PREVANE36M3Tidletest.emub3 (71.0 KB)

2 cranking logs attached and 3rd log (121) when its idling.

scope_2026617_121.emubscp3 (617 Bytes)

have tried with shield connected and disconnected and no different. if car starts, then it runs fine but on 2 occassions it has just cutoff while cruising.

Will be changing to a new crank sensor but before spending money and wasting more time , i thought id ask here.

scope_2026616_2127.emubscp3 (596 Bytes)

scope_2026616_2131.emubscp3 (609 Bytes)

The scopes look good. The anomaly on the scope (4 green lines near each other) it is an artefact it is not and issue. All ignition and injection events looks great. What I woudl disable is firing all injectors during cranking. Also please post a log file from cranking. And make sure there is enough air during startup

Will do that. Thanks

starting log from cold and map. thanks

PREVANE36M3Tidletest.emub3 (70.4 KB)

20260618_1733.emublog3 (148.7 KB)