5.3 Ignition settings 5 SETTING UP A BASIC CONFIGURATION
5.3.11 6G72
Known applications include:
• Mitsubishi 3000GT
• Mitsubishi Galant V6
• Some other Mitsubishi and Chrysler V6 models
This spark mode comes in two variations. One used an optical trigger with six slots for the CKP signal and four
slots for the CMP signal. Another variation used Hall effect sensors with a three tooth crank trigger and a four tooth
cam trigger. Both require pull-up resistors, and from the ECU’s perspective, they look alike, as in both cases the
ECU will “see” three pulses on the CKP wire for every crank revolution.
Ignition input capture needs to be set to Rising Edge. This mode supports full sequential operation.
5.3.12 IAW Weber
Known applications include:
• Ford Sierra Cosworth
• Some Fiat and Lancia applications
This application uses a four tooth crank trigger with a VR sensor and a two tooth cam trigger with a Hall effect or
VR sensor, depending on the year. Ignition input capture needs to be set to Falling Edge. This mode supports full
sequential operation.
5.3.13 CAS 4/1
Known applications include:
• Mitsubishi 4G91
• Mazda Protege and 323 with optical distributor
This mode uses a Hall effect or optical sensor spinning at cam speed, with both sensors requiring a pull up. There
are four teeth on the CKP signal and one on the CMP signal. You will need to set the “Angle between main and
return” parameter to the distance between edges of the optical sensor. Note that if you are not able to get a stable
signal off both edges, you should instead use Toothed Wheel mode. Full sequential operation is supported.
5.3.14 4G63
Known applications include:
• Mitsubishi 4G63 with distributorless ignition, as used in Eclipse, Galant VR4, and Lancer Evolution
• 1990-1997 Mazda MX5 Miata
This spark mode comes in several variations. One used an optical trigger or Hall effect sensor with four slots for
the CKP signal and two unequal length slots for the CMP signal. Another variation used Hall effect sensors with a
two tooth crank trigger and a two tooth cam trigger. All require pull-up resistors, and from the ECU’s perspective,
they look alike, as in both cases the ECU will “see” two pulses on the CKP wire for every crank revolution.
Ignition input capture needs to be set to Rising Edge. This mode supports full sequential operation.
Caution: Early Miatas used a version of this CAS where the timing is 360 (crank) degrees off normal. On these
cars, you will need to swap cylinders A-B with cylinders C-D in the wiring.
AMP EFI MS3Pro manual version 1.202, firmware 1.5.0, 4/21/2017 Page 90
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