Hey all,
I have a 2008 TBSS with a bunch of mods that seems to periodically have a hiccup while steady state cruising. It doesn't happen all the time, and it doesn't seem to happen under heavy load, but under mostly steady state conditions, it'll happen.
What I notice is that the cylinder airmass calculation swings drastically low or high for just a split second. This causes the injectors to either shut or dump rich, as well as the timing to dip very low or swing very high. But only for a split second. Again, this is mostly steady state. I don't see any strange torque management happening. Trans isn't shifting. VSS is fairly constant. TPS isn't opening or closing. It's like the computer fails to accurately calculate the airmass load for just a brief moment.
Attached are some logs, screen shots, and the tune. Has anyone run into this before?
Tune File: TUNE_0001_withTCU_flex_iat_18.hpt
In this log, you can see at time 3:50:220, the ECU calculated a very high injector pulse width, and pulled a bunch of timing, for just a split second:
cut-1.png
Log file: cut1.hpl
And in this log at time 1:30:981, the opposite happened. The engine pulled all fuel for just a split second:
cut-2.png
Log file: cut2-fuel.hpl