i've changed the filter, and checked the pressure. The pressure read fine while idleing, when it was revved a little it would spike up to around 50 psi or so, then drop back down to around 44.. I read in a chilton i think that after a few minutes once its warmed up it should drop by 3-10 psi, which it didnt.

 

its all good now..

 

so the fuel filter fixed it? cause i got the same misfire problem