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Yeah it's definitely not defined but when cold starting and idling on e85 would be nicer to actually have what's commanded

I think tunerpro is possibly displaying the wrong number for ignition timing when in P/N.

There are a lot of things that adjust the ignition timing from the base timing in the table.

There should be a table for ignition timing Vs ECT, you can use that to bring in more timing when the engine is cold.

Yes there is but then it's across the board where it adds timing

That table should be ECT Vs mgc. That's how you get more timing when the engine is cold.

What I'm going to also try next on the ecotec is move the IAT sensor into the Plenum or possibly runner so I can tune the Ignition timing VS IAT better. Similar to how it's done on the L67 when you fit a IAT sensor in the LIM.

Ive looked at the idle spark routine code there's nothing there other than those scalars which are turned off via coolant anyway and it just uses the normal idle spark table then, the normal spark routine simply runs and adder or subtractor via all the normal tables, there's only one spot for P/N checks that i can see, im not sure what it's adding it doesn't calc as timing correctly but ive added it to this xdf, it has a speed check if it's lower it'l use that value so it maybe for idle i dont know, try changing that 19.31kph to 0 and see if it does anything to idle timing.

I added a few other tables that were in VS XDF over.

My only other thought is do you have an MALF code set? that might alter timing.

Ok thank you I will check this week hopefully

can we also add this to the VY_V6_SC_$07_Enhanced_v1.2h please

I was under the impression that the spark cranking tables are used for starting which is coolant based. The calcs are something like /256*90-20 I think which will be around 15deg of cranking ignition timing. What I also noticed that if I changed iac g/s air in either p/n or drive that it will change ignition timing. So if I took say 1g/s from the idle area in the p/n iac table my idle ignition timing increased closer to what I was commanding ect. I think if desired idle is above or lower then commanded it’ll change g/s airflow and ignition timing

I noticed my actual idle rpm was higher than my commanded. So originally I played with lowering idle timing and also the scaler maximum idle timing adjustment which gave me a smoother idle. I’ve since kept the factory timing settings and just lowered iac g/s and my idle is much closer to commanded and my ignition timing.

Added the tables I'm talking about