1.3 MS3Pro accessories 1 INTRODUCTION
1.2.2 Wiring harness
There are two separate components to the wiring harness, one with a white connector and one with a gray con-
nector. They plug into the matching colored connectors on the ECU. These connectors are keyed so that they will
not latch if you plug the wrong colored connectors in.
AMP EFI manufactures a generic 8’ wiring harness, as well as a connector package for those who wish to build
a harness completely from scratch. We also offer model specific wiring harnesses for select applications.
1.2.3 Tuning cables
The MS3Pro supports tuning via both USB and RS232. Both cables are included with a standard wiring harness
package. The original MS3Pro uses inline connectors in the wiring harness. Replacement cables are available
from AMP EFI resellers.
1.3 MS3Pro accessories
1.3.1 Sensors
The MS3Pro can work with most OEM temperature, MAP, MAF, and throttle position sensors, as long as you’re able
to get the required information on the sensor’s output curve. This is covered in greater detail in section 4, Wiring.
If your installation requires new sensors, AMP EFI and its resellers carry GM temperature and MAP sensors.
1.3.2 QuadSpark
The MS3Pro uses logic level spark outputs. These are compatible with be used with AMP EFI IGN-1A race coils
or OEM coils with integrated ignition modules, such as GM LS series coils, Toyota 1ZZ coil on plug coils, or the
pencil coils on VW / Audi 1.8 Turbo motors. They also work with most OEM ignition modules. Some manufacturers,
particularly Ford, Chrysler, and BMW, frequently build the ignition module into their ECUs. If you have coils which
do not have then ignition modules built in, and do not have a separate ignition module, AMP EFI manufactures
their own 4 channel ignition module, the QuadSpark. This module can drive up to four ignition coils using Bosch
BIP373 power transistors.
1.3.3 Ignition coils
AMP EFI sells several ignition coils as well. The IGN-1A has a built in ignition module and can be wired directly
to the MS3Pro. All other coils require the QuadSpark or other external ignition module when used with MS3Pro.
Coils that AMP EFI offers include the IGN-1CD for capacitive discharge ignitions, the IGN-4 four tower coil pack,
the IGN-6 six tower coil pack, and IGN-1FD coils for mounting directly to the spark plugs.
1.3.4 CAN-EGT thermocouple interface
Thermocouples put out a faint voltage that requires an amplifier circuit to produce an accurate reading. The CAN-
EGT includes amplifiers for up to eight of these sensors, which can be used to measure exhaust gas or cylinder
head temperature. The CAN-EGT module then transmits the temperature data to the MS3Pro over a CAN network
to avoid the inaccuracies of using a digital to analog conversion circuit. The MS3Pro can use this both for data
logging and for safety shutdown features if the exhaust gas temperatures go too high under load.
The CAN-EGT module can also gather data from the digital output on up to eight separate Innovate Motorsports
LC-1, LM-2, or MTX-L wideband controllers and transmit this information to the MS3Pro without using any of the
MS3Pro’s analog inputs. Using this allows the MS3Pro to run separate wideband O
2
correction for all cylinders.
1.3.5 MicroSquirt
The MicroSquirt was originally intended as a fuel and ignition controller for powersports applications, but its CAN
network capabilities and easily reprogrammed firmware allow it to be configured for other functions. Current release
firmware allows it to be used as a transmission controller for many applications. The CAN bus allows you to view
the MicroSquirt data through TunerStudio as if the MS3Pro and MicroSquirt are a single control unit with a single
point of tuning. AMP EFI offers plug in harnesses for select transmissions.
AMP EFI MS3Pro manual version 1.202, firmware 1.5.0, 4/21/2017 Page 14
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