Evaporative Emission Control System Malfunction
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
no , one is 5on 5 the other 5 on 43/4
ESC / Electronic Spark Controll Circuit. and the knock sensor signal.
440 yards is equal to 0.25 miles. This conversion is based on the fact that 1 mile is equal to 1760 yards. Therefore, to find the number of miles in 440 yards, you divide 440 by 1760, which equals 0.25 miles.
The LCM is: 220
Electronic spark control is not receiving sinal from knock sensor Try replacing knock sensor
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.
thats your knock sensor ESC is Electronic Spark Control which governs timing.
Code 43 is a problem in the fuel delivery system.
Code 43 is listed as Electronic Spark Control Circuit