My MS1 VE table doesn't seem to like even a small change in ambient temps resulting in running lean when ambient temps drop.
At the moment my IAT sensor is just loose behind the headlamp so not exactly hot or prone to heatsoak, it pretty much just tells me ambient air temps.
The table on the right was tuned using autotune and dialled itself in over the course of an hour of mixed driving with IATs of ~25-30degC. The engine felt super responsive and target afrs were 99% perfect at the end of the tuning session.
The next morning ambient temps have dropped to 18degC and the idle was really lean 16.5:1. I couldn't drive the car as afrs were too lean so I had to wait for the engine to warm up and start auto-tuning again which gave me the table on the left which also felt great.
IAT correction is a fudge. I can have great hot-starting by upping the warmer regions by a few percent but If I tune at a warm ambient temp region, I then need to up the colder regions of IAT correction to accommodate for dense air.
My injectors are RX8 425cc high imp. Dead time is set to 1.0ms. I cant for the life of me find correct listings for the dead time. I've tried to tune dead time by switching from 2 squirts to 4, and also 1.2ms dead time 2 squirts to 4 and each time the afrs at idle run completely lean and the engine stalls.
Could injector dead time be the sole reason for my temp issues? I've also been advised to try running a dead time of 1.6ms or higher and then switch to 4 squirts to see if I can get the engine to still run and tune the 2 to 4 squirts effectively but I haven't tried that yet.