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Car stalls when VVT Minimum Coolant temp is reached at idle
Posting this for documentation purposes, I haven't seen anyone specifically mention stalling when the car hits the coolant activation threshold at idle with 'Adjust Inj Timing Based On' set to Off. If I am driving when VVT activates I notice a very slight stutter but it isn't an issue to me. At idle, VVT Duty jumps to 99.8% even though my advance table is commanding a -0.2% advance, and my car stalls without fail every time.
Running Firmware 1.4.0
A fix for the Injector timing freaking out when VVT turns on is in 1.5.xx however I don't care enough to deal with the changing PID algorithms and engine states features. That doesn't even seem to be the cause in this instance as the injector timing barely changes.
I have had issues in the past with my car not liking VVT being activated when cold, however I will be trying my coolant activation threshold at -40 clt like it was in the basemap to see if my additional idle tuning fixed those issues.
Your VVT min/max values are probably wrong, forcing a VVT error, and when the VVT enables at your threshold temp, it tries to target an impossible angle, forcing the duty to max and stalling the engine.
Thanks Rev, I will try recalculating my min/max VVT angles and see what I get using this guide I found, it looks like I probably calculated these wrong originally.