I have a 99 Outback Legacy with approx 90K miles. 
  
Just recently, when accelerating from a stop, I am frequently experiencing little response (low fuel pressure?) when I press the gas pedal, followed by a surge. 
  
Just doing some basic troubleshooting ... best guess as to the cause?  Fuel filter has recently been replaced. 
  
I also every once in a while need to inexplicably jump the car after it sits for a few days.  Related? 
  
Thanks