Last night my 2000gtp started miss firing terribly while i was driving....it sounds like it is starving for fuel or ...clogged cat....but what has made this difficult is my car has not thrown a CEL..while the car is spuddering while i drive ALL of my lights are flickering on my gauge cluster, the fuel gauge falls to zero....and my tach drops off...ive already swapped pcms and checked the icm for corrosion along with my battery...what else could be causing this problem? Im completely lost...