1996 Isuzu Rodeo Question eng faltering (starving for gas) &

Engine Mechanical problem
1996 Isuzu Rodeo Question 6 cyl Two Wheel Drive Manual 164k miles

My Rodeo acting like it has clogged fuel filter. (Starving for gas & dying) We changed the in-line fuel filter & cleaned out the fuel injectors. (MPFI) No improvement. Seems to run just sligtly better when gas is added. The ck eng. Light comes on & goes out intermittently. We dont have special scan tool required to retrieve trouble codes from computer. What other components have similar symptoms when they malfumction? Thank You so much!