I have a 97 k1500 suburban 5.7 with 160000km on it that recently started
hesitating when cruising or under light load. It idles fine and seems to be
ok under full throttle. Fuel filter has been replaced as has pcv, egr
cleaned (wasn't sticking). New plugs, wires, rotor, cap installed
Decemberish. The check engine light is not on, but the mechanic pulled off
p0141, p0161 (O2 sensors) and p0300 (random misfire) as stored codes.
Mechanic says fuel pressure is at 55psi idle and goes up to 60 under full
throttle and that the transmission is fine. I've also run some injector
cleaner through the system with little improvement. Help me please!