Car starts but dies after a few seconds?
 

My car was hard to start and I had slowly moved the cranking pulse up until it cranked over easily with no throttle input. It starts, idles fine and then after a few seconds the car will sputter out and turn off or almost die depending on the coolant temp. If I try to start the car again it will start and then it seems good. Any guidance for a reliable startup? I have a log from yesterday. This was a cold startup in the morning when the car had been sitting all night. It almost died but recovered. On some colder mornings (50s F) it would die.

Set the overrun map in engine sates to 23 and lower all of the cranking duties by 10. I would also change the slow accel & deccel to 800 &-800.


https://cimg7.ibsrv.net/gimg/www.mia...06e0826aba.jpg

If your cranking/initial startup is working well I wouldn't mess with it, otherwise agreed on the above. Looks to me like you could use a little more afterstart enrichment/warmup enrichment.

https://cimg2.ibsrv.net/gimg/www.mia...4e42db478c.png

I find it easier to control the ASE Taper with time based units instead of engine cycles. If you decide to change it, your current ASE Taper will run a lot longer since it is in tenths of a second instead of cycles, so adjust accordingly per your cold start logs.

https://cimg9.ibsrv.net/gimg/www.mia...c3abd7aec2.png

Thank you guys. I made these changes this morning after the car had been sitting for 2 days and it started well. There was one tiny little stumble that lasted like a second that I need to look at but it's much better now. Appreciate it.