on both capacitors have a potential value below the value of the pressure signal transistor 96 is blocked however when the potential value on either capacitor 50 52 or both exceed the value of the pressure signal transistor 96 conducts conductance of transistor 96 raises the value of the potential appearing at the emitter of transistor 88 above the value of the pressure signal applied to its base thereby blocking transistor 88 blocking of transistor 88 blocks transistor 90 and with transistor 90 in the blocked state the potential at output terminal 70 assumes a ground potential terminating the output signal fig2 illustrates waveforms at various points in the circuit of fig1 fig2 a shows the output of multivibrator 12 with each of the pulses there being triggered by an ignition pulse fig2 b shows the q 1 output of flip flop 15 fig2 c shows the voltage across capacitor 17 with constant charging rate when the output q 1 of flip flop 15 is high and an equal discharge rate when output q 1 of flip flop 15 is low fig2 b 39 shows the q 2 output of flip flop 15 fig2 c 39 shows the waveform of the voltage developed across capacitor 17 39 similar to that of fig2 c but of opposite phase fig2 d shows the output of flip flop 20 and fig2 e shows the injector synchronizing pulses tr1 and tr2 in fig2 a the cylinders receiving ignition pulses 35 36 and 38 fire regularly the cylinder receiving ignition pulse 38 misfires due to an excessively lean mixture the misfire results in an incremental decrease in torque and engine speed causing the period between.