So this fixed your high RPM cold start? Anytime under 50 degrees mine does this and it will hang there for a minute (Defroster on makes the RPM raise to like 2100rpm). I would like to take mine down to about 1300-1400rpm.

 

To clarify, add value to the latency or remove to richen up? Sorry, just been awhile since I worked with them.

 

yep happy days

now that i think about it after mrfred said that iscv table was incorrect i did adjust that first as a trial (over 2 weeks)
and when i lowered the step position i'm sure idle changed however after a week it went back to high idle so wether some table learns and changes i don't know but for sure with both tables lowered as i have shown them my idle is 1300max.
nothing else was adjusted whatsoever.
i even left the car for 2 days to make sure it was stone cold and its perfectly how i want it now.

 

Those tables you changed are neither idle nor stepper values. Changing those tables will however raise or lower the calculated value for the vertical axis of the big stepper table. That means you are indirectly changing the initial stepper value by affecting which cell in the big table gets choosen. Its not the way to do it, but its working for you so no problem. My thought is that it would be better to directly change the values in the big stepper table, but did you just say that you tried changing the stepper value in the big stepper table with no long term reduction in startup idle??

 

no i never changed anything in the "table".
when i changed iscv step it worked for a day or 2 then back to normal.
then i adjusted rpm leaving step where i set it and idle has now stayed low

 

If you've got time, try putting the stock values back in the tables that you changed, and then alter the values in big ISCV table.

 

i'll give it ago

 

how do i set my tune to compensate various e85 ethanol levels?
i.e mixing with whats left in the tank of regular gas will not always be the same mix ratio's and/or different meth levels of e85 from different pump stations ?

 

There's no automated way to do it yet. You'll just have to tune for it if you are going to drive the car hard with a particular ethanol content.

 

mrfred, are you or tephra or anyone else working on possibly creating a flex-fuel option for our ECUs with the GM sensor?

If so, any possible timeframe predictions?

 

I'd been planning to do it, but got diverted doing some Evo 10 disassem. I'll probably work on Evo 10 disassem a little longer, and then get busy on the flex-fuel patch.

 

This is great news yet again. Thaks Mr. Fred. Your work is definitely appreciated.....

especially when I hit the gas pedal

 

Did you find out if the above mentioned bolded item helped at all?

-E

 

This helped a lot on my car although did not completely get rid of cold drivability issues. even stock my car never liked the cold.

 

Here's a link to another thread I started that's related to E85 tuning:

https://www.evolutionm.net/forums/al...afr-ack-3.html