I've been having trouble with starting and cranking tuning. I've tried high and low values for cranking pulse-width each day and have managed to get the car starting each time but roughly. I can't tell if giving more throttle helps or not, sometimes it does sometimes it doesn't. I've attached my tune and a log of a coldish start.(The cranking pulse-widths are wack). Also, what about the log can I use to tell what is wrong with the tune? What do I have to look for?

 

Your idle cranking duty steps seem really really high to my eye. You are giving the car a lot fo air startup thus requiring more fuel.I would try lowering your table for that. In fact, your idle cranking duty table exceds what you set as your max possible iacv value so your car doesn't know what to do. Try dropping every value in idle cranking duty by about 30 and try again.

 

Oh god I didn't change that. I remember messing with that when I first got the car started. I lowered the duty cycle and now its starting easier. I matched what the MS2PNP settings are from DIY. I guess now I can really mess with the pulse-width properly....

 

Reviving this thread cause now I'm having more issues. MS reads a low 11 volts for the battery reading. Is that too low? I've been suspecting my battery for a while now. I've been having trouble starting the car cold. Long cranks, the engine will catch somewhat but won't get going. Sometimes the exhaust will pop as if it's hitting a spark cut limiter, then die. The cranking will crank for a bit then gets "hung up" or something, hard to describe. If it gets going it doesn't stumble or struggle so I'm assuming this I just related to cranking stuff. Hotter starts and starts right after the car running have been ok, but not great. I've attached the log and tune. As for the log, what should I look for in the log in order to help me get better cranking and starting settings?

I'm running MS3X in a 94 chassis.