I'll share this about cold start and idle as its maybe a little different from what you guys do and for sure the verdict is still out on whether its good or not as I still have a way to go . Also I'm not sure if the way I set up the ECU up for this is a good idea or more trouble than its worth. This is the last mostly cold start, CLT was 30C
![cold start.JPG](./download/file.php?id=10244&sid=d7551233c6e8bd0c874e039e721f62a0)
- cold start.JPG (105.98 KiB) Viewed 20757 times
It cranks about 1 sec while I'm opening the throttle slowly which richens the cranking mixture (because things aren't set right yet) then cylinders start to fire but it looks like I wasn't convinced they were all on so a throttle blip at 14 sec then it settle into idle at 16 sec
What I have is 3 tables. There is the main VE table and on the left it a 300 rpm column. This cranks at 150 so that the 70% is what is used until its running I was originally planning idle at 1000 and stall saver setting at 700, I need to move those. Also I wasn't expecting the 45kPa idle or quite so linear a MAP so I have too many MAP rows up top and not enough down low. There is no limit to how many row or columns I can add to a table in this ECU but I like to be a bit strategic so I don't waste time tuning stuff that doesn't matter and need to move some stuff around and maybe remove some. But for starting it is the 1 row on the left.
![Startup.JPG](./download/file.php?id=10245&sid=d7551233c6e8bd0c874e039e721f62a0)
- Startup.JPG (304 KiB) Viewed 20757 times
Then the Coolant correction table. I have it setup with an RPM axis but haven't messed with that yet, just temp. Its a 70C t'stat so correction at 70/80 kind of needs to be by default. I'm still roughing this in and if I mess with the VE table then this is wrong again.
Last I added a start enrich table that is like a prime and adds fuel based on revolutions and coolant temp. Again I'm just starting to rough this in because before this can be setup up right the engine has to right at whatever temperature I'm trying to start it at. Its a slow process.
I'm also using spark timing for start and then idle which kind of buggered some of my earlier startup fuel settings. Same as the VE table, cranking is the 1 column on the left. It kicks back if I go above 10 degrees but then once it starts I need to pull the timing back or I can't get the rpm below 1800 or so. I need to add of resolution around idle but right now I start pulling timing at 2000 and below and hold ot steady around idle rpm which is the only way I've ever found to get a nice steady idle like in the video I posted.
![Timing.JPG](./download/file.php?id=10246&sid=d7551233c6e8bd0c874e039e721f62a0)
- Timing.JPG (142.91 KiB) Viewed 20757 times