RUNNING RICH, REASON ?

So it is possible that my running rich is on account of the vacuum ? On Thursdayxi will be stitching over to manual brakes and the he'll with that... Lol
I just want the car to run like it did all of last yr. I swear, it's still the same, I used it put that key in start it and off I went, six pack and all. No problems, no overheating and I put a good 2000 mills in it last summer with no problems.
This yr, it still turns over and runs with no problems but it's running so rich, I only see a cloud of black smoke when I kick it open (full throttle) not to mention I don't get more than 70-80 miles on a full tank of gas. (93 octane)
I'm basically filling it up once a week with only a cpl of days of driving, around town.
It's been a tad heartbreaking, I almost locked it up for the summer, before spring was done.
Like I said, I'm waiting till Thursday to see the difference.
MAPS