90 Suburban

I Have A 1990 Suburban It Started To Spit N Sputter And Stall It Would Start Rite Back Up N Drive Real Bad Next Day No Problem The Next It Would Run Bad Again Autozone Pulled The Code 44 Fuel Problem (lean) Told Me To Change Fuel Filter Did Ran Great For A Week Then Rite Back To Same Problem Injector Cleaners Temp Fix Now Wont Start At All Turns But No Start Loud Clunk Noise When It Sounds Like Its Going To Start (like It Locks Up ) Then It Just Turns No Start?