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Forum nameEngine Management Systems & Controllers
Topic subjectRE: MS2 - Stalling After Start (No Idle)
Topic URLhttp://forums.2gnt.com/dcboard.php?az=show_topic&forum=54&topic_id=5700&mesg_id=5823
5823, RE: MS2 - Stalling After Start (No Idle)
Posted by RfOeCnKdOeNr, Dec-31-69 06:00 PM
I started her up today... Took a log of the warm up.

Even after warmup with closed loop I couldn't get the idle down below 1200/1300...

Just for fun I tried open loop and ran a log. The motor was warm but I ran open loop with a start value of xxx. I then went to the end of the idle steps graph (because the car was warm and began lowering or raising the steps to see what happened. This was the only change throughout my entire process that actually began getting real time results...

As I lowered the final step at the end of the graph the RPMs began to decrease. At about 20/25 for the final parameter on the graph I was idling smooth at 900/1000 RPMs. I tweaked the idle advance a bit and it was even smoother...

Could this be right?? I even drove around a bit and it always settled back to a nice 900-1000 RPMs.

Here is my first log (closed loop warm up):

https://docs.google.com/file/d/0B22tb0XxveQ8Wmp5MkE4R2tTTzA/edit?usp=sharing

Here is my second log (open loop already warm):

https://docs.google.com/file/d/0B22tb0XxveQ8U3M1YTZvNUJadG8/edit?usp=sharing

I didn't get a warm up log yet with the open loop because the car had no time to cool down.. But here are the open loop settings and I will get a warm up log tomorrow ...

https://docs.google.com/file/d/0B22tb0XxveQ8VU1zOTZtUHlYWHM/edit?usp=sharing

I basically chose a number for the start value based on other runs and said 110. Then I lowered the last bin until I got an idle I liked. Then scaled the other bins up. Obviously this need sot be tweaked considering if I continued to scale up I would pass my start value... Or can I?

I don't know... Hopefully this will spark some ideas in you guys as to how I should approach this.

Thanks!

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