5.3 Ignition settings 5 SETTING UP A BASIC CONFIGURATION
• Ignition input capture: Rising edge
• Spark hardware in use: Spark
• Dwell type: Fixed Duty
5.3.5.1 Checking the timing During install, it is important to confirm the timing is correct. To test this it is best
to first run the EDIS in limp home mode. This can be achieved by disconnecting the SAW plug/socket or switching
off/unplugging the ECU. Fit your strobe onto no.1 plug lead as normal (you may need to try the other tower of the
pair). Ensure EDIS still has power and crank your engine, check that the timing is exactly 10°. If not, adjust your
sensor until it is. It is safe to idle the engine with the SAW lead disconnected; timing should be rock solid at 10°
BTDC. Don’t forget to reconnect the plug when done!
Now that you have confirmed that the EDIS is correctly running at 10° BTDC base timing, you need to check
that MS3Pro is correctly commanding timing on the EDIS. Start the engine and then on the Ignition settings menu,
select Fixed Timing and enter 15 BTDC; check that you strobe 15° BTDC on the crank.
When done, reset Fixed Advance to “Use table.”
5.3.5.2 Cam sensor and EDIS The EDIS module itself does not need a cam sensor as it always runs in wasted
spark, firing each coil pair every crank revolution. However for sequential fuel it is necessary to use a cam sensor
in addition so the MS3Pro knows what phase the engine is on. Most original cam sensors are 2 wire VR type, so
only require a ground and the signal connecting to the MS3Pro. The code works the same whether a hall or VR
sensor is used.
5.3.6 420A/Neon
Known applications include:
• First generation Chrysler / Dodge / Plymouth Neon (both DOHC and SOHC)
• Second generation Diamond Star cars (Mitsubishi Eclipse / Eagle Talon) with 420A
• 2001-2002 Chrysler PT Cruiser
• Many four cylinder “Cloud Cars” (Stratus, Breeze, Cirrus)
This mode uses an irregular crank wheel that can support wasted spark without a cam sensor. It also allows
sequential injection if the cam sensor is used. Both sensors require pull-up resistors from the sensor power wire
to the signal wire. Ignition input capture should be set to Rising Edge.
Factory ignition coils on these motors require an external ignition module such as the QuadSpark.
AMP EFI MS3Pro manual version 1.202, firmware 1.5.0, 4/21/2017 Page 88
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