1996 Dodge Caravan...PLEASE HELP!

[mygirls9901]

Wednesday (9/20/17) I stopped at a stop light and when I tried to go it only got to about 15-20 mph but rpms were at about 4000. Then it shifted (automatic trans) and it was fine. This morning I went out and now it won't start.
It cranks like it wants to start, the fuel pump is brand new (installed by Christian Brothers Automotive and picked up from the shop on the 8th) and makes noise before starting.
The battery is only a couple months old (3 at the most).
I bought the van (1996 Dodge Caravan 3.3L V6 automatic) in December last year. I have replaced the battery (a couple months ago), alternator (about 4 months ago), windshield wiper motor, input/output sensors on the tranny, and just had the fuel pump fixed about 2 weeks ago (got my van back from the shop on the 8th). I've also had new tires put on, rotation, brakes, and hydraulic line fixed.
It was running fine from the time I got it from the shop until Wednesday. Most people I have talked to have said it is the vacuum lines and I should check those and it would be an easy fix. Does anyone have a diagram of these so I can check this out as well? Any help is greatly appreciated!