1999 Ford Explorer so many problem

I have had this vehicle for under a year and have put just about new everything in it. Recently the truck would hesitate when I accelerate. Oil was just changed, and new fuel pump put in. When I would come to a stop the car idled low, sometimes dying on me. Also when it idles low the front end seems to shake. I thought the hesitation might be the fuel filter. So had that changed. Still seems to hesitate but not as much. But it still seems to accelerate slow, and shakes when I come to a stop. Spark plugs are new within the last 6 months. Any help? This car is junk