I am running a MS1v3 board with Extra 29y5 code, and have recently been having a really, really bad cold start issue. It should be noted I am using 3 spark waste-spark, and stock M50tu coil packs (93 325is)
On Sunday, I was able to start the car cold, with a couple plug cleanings. Using the same settings on Monday, with the same ambient temp, the car would not start. What can I do to dial in my cold start settings? Trying multiple cranking MS's doesn't help, nothing seemed to help at all tonight. Yesterday, playing with the MS of on time for cranking helped a good deal. I'm kind of at a loss, as it *should* be working.
Thank you very much,
'93 BMW 325iS - Rebuilt M50 w/ 0.140" HG (~8.9:1 w/ head/block decking), Custom turbo system T3/T4 .63 .50, Megasquirt v3.57 MSnS-II/Extra