Tuned by someone else.
LS3. Mafless / SD. LTFT have been disabled/ignored and is only running off STFT. STFT looking normal -+ 5 to 7. Now and then it might blip up to +10 +13 when I gas it but then drops back down to +6-+7
1. Is it OK to run off STFT only? Or should LTFT be re-enabled? Im guessing the tune is built around LTFT being de-activated?
2. After logging with a scanner for 15 minutes or so, I can see Bank 2 Oxygen Sensors Voltage drops and hangs around the 45-78mv mark. While Bank 1 still oscillates between 60-800mv.
However, the both banks STFT Trims still look good -+.10? Scanner shows Closed Loop.
Are the low voltage readings telling me there is something wrong? And the tune is keeping it run OK? Or what issues can be looking at for this to happen?