328 sluggish acceleration and stalls on downshifts

Any thoughts / experience folks have with the following scenario is appreciated. Car starts fine warm or cold. Will idle okay after start. However it is sluggish when you hit the pedal (press it all the way down the it is barely noticeable) and every time you put the clutch in and let the revs start going down to downshift the car will stall. It doesn't sound "off" when the accelerator is being used but when you drop off the accelerator it doesn't sound quite right (no back firing or banging or anything, just not quite right). I'm thinking a fuel system issue but does anyone else have ideas of where to start or other potential issues. Thanks in advance.

 

Thanks to all. The more i think about this (and having talked to some folks who are more knowledgeable than I), i think I may have lost a bank. I would have expected the car to run rough, etc. but apparently these don't due to the camshaft design. The car is going into Competizione this week and I'm sure they will get to the bottom of it. I appreciate the replies from folks and the thoughts.

 

Thanks. Yep, nothing out of the left side (consistent with the exhaust sounding off when I had to drive it a few miles back home).

 

Thanks. Yep, I'm having it trailered. Thankfully I didn't have to drive far home with the car (4 or so miles) and at the time i didn't know what the issue was (I wouldn't have driven it if I had). No fire or smoke, so it would seem I dodged a bullet.

 

Turns out that the issue with the loss of a bank was a bad ignition coil module for the 5-8 bank. Thankfully it wasn't something more concerning (or potentially expensive)!