LA sequential fuel and spark EFI conversion

tanis4457 said

Yes the iacs are typically run with more air on start up and ramp down as it warms up. It’s kind of counter intuitive to a choke on a carb being closed at cold and slowly opening.
Are you running the iac in open loop or closed loop? The two settings work differently but I haven’t gotten my rig running yet with tuner studio to try it out.

Does tuner studio have a decel enrichment cutoff? The Holley sniper has one but I’ve left it off.

Click to expand...

I've run it in both open loop and closed loop. I honestly think it works better in open loop. The stepper position is based on temperature in open loop. In closed loop it tries to reach a target RPM. I find adjusting the timing at idle vs. opening and closing the IAC has better results. The engine reacts much faster to timing changes than it does to waiting on the stepper motor to move. I had to set the closed loop IAC control fairly aggressive to keep up with the idle, which in turn caused the start up to to be undesirable. I'm happy with the open loop control for now.
I'll have to look into decel enrichment cutoff. I'm sure there's something for it, but not spelled out that clearly.