99 4.3l starts sometimes
my 4.3l will start and run great as long as I drive it daily. If I let it sit for a day or so it will not start, it will crank for 5 min or till battery goes dead. If I charge it for a few hours it usually starts right up. I' ve tried starting fluid, new coil, cap rotor, has new fuel pump. No check engine light when it does start. any ideas?