I would guess your MAP sensor took a sh!t. This video has a guy with the same issue (running like crap). He tests in MAP sensor connector and moved on to the MAP sensor itself. https://www.youtube.com/watch?v=a_5IYjnbNqQ and the continuation video https://www.youtube.com/watch?v=pnCglmiY8yc

Looks like Autozone stocks them where I live, OReilly's and AdvA look to be online order.