been having efi/eec IV problems, now im sputtering on hard acceleration? any ideas?

 

do u have dual tanks, if you do, switch to you other one and see if it still does it, mine has the same problem and gotten progressively worse and i am almost positive it is the fuel pump but i am just waiting on the cash to get a new one

 

when i was doing my auto shop internship i had to figure out a prob like this on an 89 150. It was a bad accelerator pump

 

single tank, fuel injected,

 

Pull the codes.

 

If you havn't already, change the fuel filter. It's cheap, might fix your problem, and you probably need a new one anyway. My truck did the same thing and I chased things forever before I figured it out. Now I change the filter every year or 25k miles, whichever comes first.