RomRaider

There's various tables available now for coolant based enrichment, but none of them seem to modify what's needed to support TGV's. "Primary Open Loop Fueling Compensation (Coolant Temp)" and "Minimum Open Loop Enrichment (Coolant Temp) don't appear to effect idle. These as far as I can tell are much richer in the TGV'd USDM than JDM already.

I thought "Minimum Open Loop Enrichment Idle (Coolant Temp)" was it, but it seems there's additional logic for activating this. I've successfully hot idled at less than 14.7AFR by changing the high temp columns in this table, I've also have very smooth TGV-less starts by changing the low temp columns of this table, confirming the table AFR was the actual AFR with the onboard and offboard WBO2's. However it seems that this only works after a reflash/ecu reset. Afterwards it returns to the old behavior, which seems to be as follows:

1. Start with ~10-11 AFR.
2. Slowly ramp up to 14.7 over a period of ~15-20 seconds.
3. Enter closed loop.

This seems to happen regardless of temp, as long as it's a cold start (Less than 50F so far). However without TGV's you can't stably enter closed loop, so as soon as this happens the idle RPM jumps around as there isn't enough fuel burned (WBO2 indicates lean, rpm drops, ecu adds fuel, continue). If this time could be doubled, cold start idle would be fine except for staying in open loop longer. This makes perfect sense, as TGV's only operate for slightly longer than this period, after which entering closed loop is stable.

There are additional warm-up enrichment tables that I'll be adding to the next ECU def update for the 32-bit ECU.

Any idea when this is going to happen? I can also test these tables if you like.

The problem gets even worse in warmer weather because the ECU attempts to enter CL almost immediately, and either the fuel isn't atomizing or the O2 sensor is slow

probably june-july-ish for the next ecu/logger def release