1993 K1500, 5.7L, 5 sp manual,
I've got a couple other threads going but the engine codes are cleared up. Apparently, 42 & 54 can both be caused by loose ground wires at the thermostat housing bolt. Thank you, Richard (someotherguy), for that. The codes are gone but the miss remains.
The idle is a little rough. It's very easy to stall. I need to feather the clutch very carefully to get going. At speed, the miss is evident as well. It's a little jerky with drive train slack.
I've replaced: plugs, wires, cap, rotor, Engine Temp Sensor and MAP sensor.
I have checked the TPS. 0.5v closed. 4.5v wide open. Very smooth needle on the multimeter in between.
What else can I check or "shotgun replace" that can cause wide-range miss like this? From what I understand, the Idle Air Control Valve could cause rough idle but isn't suspect for anything above that. Should I start replacing injectors?
I've got a couple other threads going but the engine codes are cleared up. Apparently, 42 & 54 can both be caused by loose ground wires at the thermostat housing bolt. Thank you, Richard (someotherguy), for that. The codes are gone but the miss remains.
The idle is a little rough. It's very easy to stall. I need to feather the clutch very carefully to get going. At speed, the miss is evident as well. It's a little jerky with drive train slack.
I've replaced: plugs, wires, cap, rotor, Engine Temp Sensor and MAP sensor.
I have checked the TPS. 0.5v closed. 4.5v wide open. Very smooth needle on the multimeter in between.
What else can I check or "shotgun replace" that can cause wide-range miss like this? From what I understand, the Idle Air Control Valve could cause rough idle but isn't suspect for anything above that. Should I start replacing injectors?