you will want to figure out whats causeing it. check the spark plugs to confirm it is running lean, if they are white, that means it is, if only one is, then that injector is, if there not then id check if the o2 sensor is messed up.

if the whole thing is running lean a quick fix till you fig it out, would be to pull the vacume hose off the stock fpr, and plug the hose, not the fpr, this will raise your fuel psi...it will most likely make you run rich, but rich is WAY better then lean till you fig out the prob