3-wire PWM Idle Valve Circuit

D1, D2 Diode, 1N4001
Q1, Q2 Transistor, FET, IRFIZ34N
Q3 Transistor, PN2222A
R1, R2 Resistor, 1k ohm, 1/4W, 5%
R3, R4 Resistor, 22 ohm, 1/4W, 5%
R5 Resistor, 10k ohm, 1/4w, 5%

Ignition Coil Driver Circuits

(install as needed - only two are available when 3-wire idle valve circuit is used)

Q5, Q4, Q2, Q1 Transistor, IGBT, ISL9V5036P3 Install using Aavid Thermalloy P/N 4880 insulated mounting kit
R7, R6, R4, R3 Resistor, 330 ohm, 1/4w, 5%

Hardware

1 ea. Heat sink
4 ea. Screw, Machine, #4-40 x 1/2", Phillips pan head, zinc pltd
2 ea. Washer, Flat, #4
4 ea. Washer, Lock, Split-ring, #4
4 ea. Nut, Hex, #4-40, 1/4" across flats
1 tube Grease, Thermal, silicone base