4.6 Ignition outputs 4 WIRING
manufacturers, such as Nissan, call the assembly a “power transistor,” which more properly refers to the electronic
component at the core of the coil driver device. Some coils have the ignitor built in; those coils have more than 2
wires because of the extra functions they contain. Simple coils without built-in ignitors usually only have 2 wires.
(There are exceptions, like the IGN-1 coils, which have an isolated secondary ground and use 3 wires.)
If you’re using a factory ignitor with matching factory coils, you can expect that the coils and ignitors are de-
signed to work together. If your coils require an ignitor but you do not have one, our QuadSpark ignition module
can drive most factory coils.
4.6.1 QuadSpark ignition module
Here are the pins to use on the QuadSpark.
Wire color Thickness Connection
Yellow 20 gauge MS3Pro Spark Out A
White 16 gauge Spark A to coil negative
Orange 20 gauge MS3Pro Spark Out B
Pink 16 gauge Spark B to coil negative
Dark green 20 gauge MS3Pro Spark Out C
Light green 16 gauge Spark C to coil negative
Blue 20 gauge MS3Pro Spark Out D
Violet 16 gauge Spark D to coil negative
Black 4 x 14 gauge Ground to engine block or cylinder head
If using more than four channels of ignition output, you would use a second QuadSpark, wired up like this:
Wire color Thickness Connection
Yellow 20 gauge MS3Pro Spark Out E
White 16 gauge Spark E to coil negative
Orange 20 gauge MS3Pro Spark Out F
Pink 16 gauge Spark F to coil negative
Dark green 20 gauge MS3Pro Spark Out G
Light green 16 gauge Spark G to coil negative
Blue 20 gauge MS3Pro Spark Out H
Violet 16 gauge Spark H to coil negative
Black 4 x 14 gauge Ground to engine block or cylinder head
4.6.2 IGN-1A coil with built in ignition module
The IGN-1A is a high powered coil with a built in ignition module, capable of handling engines that make over 250
hp per cylinder. These can be used both for coil per plug applications or with a distributor. These use a five wire
connector. The connector pins are designated with letters molded into the connector:
Connection letter Function
A Spark out from MS3Pro
B ECU ground - connect to sensor return
C Secondary ground - connect to engine block or cylinder head
D Power ground - connect to battery negative terminal
E 12 volt power
4.6.3 LS series coils
The coils on GM’s LS series engines are a popular choice as they are readily available, inexpensive, powerful, and
have a built in ignition module. They can be wired directly to the MS3Pro. LS1 and LS2 coils use different connector
designs, but the connectors are always marked with small letters to indicate the function, and the function is the
same on both:
AMP EFI MS3Pro manual version 1.202, firmware 1.5.0, 4/21/2017 Page 43
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