knock sensor
I have a 92 s10 blazer and my code 43 was fixed by replacing the knock sensor. so maybe check the knock sensor and the wiring from that to the ECM.
The camshaft position sensor on a 4.3L engine is inside the distributor near the rear of the engine. Has the intake manifold gasket been replaced? Sometimes it is overlooked to plug the sensor back in after this repair has been done.
no you need the catalytic converter replaced or removed but the o2 has a code of its own which it is P0141 and says the sensor is malfunctioning
15-coolant sensor or circuit/low temperature indicated 16-system voltage out of range 21-throttle position sensor 23-mixture control solenid or circuit 36-idle air control valve or circuit 41-cylinder select error-mem-cal or ecm problem(fuel injected models) 43-knock sensor circuit 51-prom, mem-cal or ecm problem didnt see a 68 codes from haynes manual
Throttle switch error
any from 88 to 98
there isn't one.
Should be 43" from nipple to nipple....
code 43 except2.2or2.5 4flashes pause 3flashes electronic sparkcontrol knock sensor circuit probable cause faulty knock sensor or mem_cal.
knock sensor
probably the ignition switch if you are refering to the starter solenoid.