Electronic Spark Control Code 43 Speed density 1990-92
Hope this helps,
jr
Yo go to chevythunder.com dude, you'll find more than you'll ever need
code 43 is related to the spark control system. (esc) the problem is usually the knock sensor wiring connector is defective and/or the sensor. the sensor is located in the right /passenger side of the engine block near the starter.
Code 43 = Electeroic Spark Timing (EST) circuit low voltage detected OR ESC circuit problems. Without being there to put a meter on different components and check it out, all I can do is point you to the electronic spark control module.
knock sensor
HO2S BANK 1 SENSOR 3 HEATER CIRCUIT LOW One of the upstream (Upfront) O2 sensors is bad or wires are affected.
ESC / Electronic Spark Controll Circuit. and the knock sensor signal.
Electronic spark control is not receiving sinal from knock sensor Try replacing knock sensor
Code 43 is listed as Electronic Spark Control Circuit
Code 43 is a problem in the fuel delivery system.
Country code +43 is Austria. A number beginning +43 6 may be either a landline (e.g., +43 662 = Salzburg) or a mobile (e.g., +43 660).
thats your knock sensor ESC is Electronic Spark Control which governs timing.
there isn't one.
code 43 is electronic spark control open circuit.