ok my set up is pretty much stock has fast 92 3800 vigilati stall 3.90 9 inch rear cold air intake.

the car after some work idles fine throttle response is great.

problem im having first is its shifting is a lil strange long shifts from 2nd to 3rd once in 3rd shifts in 4th sometimes has to manually pull down to feel more power.

2nd is the car drives fine i do get a bank 1 and 2 lean code no spark knock or noise but around 2500 to 3500 under driving load the car falls on its face, i cant really tell if its something transmission or engine issue maybe where the lean is coming from.