Hd32-2; Miata 36-2; Daihatsu 12+1; Subaru 36-2-2-2 Vvt - amp e MS3Pro ULTIMATE User Manual

5.4 Idle valves

5.3.45 HD32-2

Used for Harley-Davidson engines that use a 32-2 crank wheel and a MAP sensor instead of a cam sensor. Cam
sensor needs to be set to MAP. The front cylinder is considered the #1 cylinder.

5.3.46 Miata 36-2

This mode is specifically written for '99-'05 Mazda Miatas running the Flyin' Miata crank trigger and the stock
'99-'05 cam sensor. Supports full sequential ignition and VVT. Ignition input capture needs to be set to Rising
Edge.

5.3.47 Daihatsu 12+1

The Daihatsu EF-SE and other three cylinder engines with coil on plug ignition used a trigger wheel turning at
cam speed with 12 equally spaced teeth and one additional tooth for cylinder identification. This single sensor is
a VR type and wires to the CKP inputs. Because of the nature of the VR sensors, it can trigger off either edge,
depending on the wiring. Ignition input capture should be tried both ways and set to which one gives you the most
stable signal.

5.3.48 Subaru 36-2-2-2 VVT

Subarus with variable valve timing (often called AVCS in Subaru's documentation) changed their cam trigger
pattern, requiring a different wheel decoder from Subarus with a 36-2-2-2 crank pattern and fixed cam position.
These engines have a second cam sensor that can be wired to any unused digital frequency input. Settings are
otherwise the same as for 36-2-2-2 mode.

5.3.49 Ski Doo PTEC

This mode supports 2 cylinder, 2 stroke engines using a single crank sensor with 24 base teeth and four added
teeth. As this engine is a two stroke, no cam wheel is needed or possible. Supports fully sequential injection for a
two stroke.

5.3.50 Nissan QG15

The QG15 used a similar pattern to the QR25, but instead of a crank wheel with 36 base teeth and two gaps two
teeth wide, the crank wheel has two gaps one tooth wide. This required a minor changes to the decoder.
5.4 Idle valves
The idle valve can be selected under Startup / Idle and chose Idle Control. The first option allows you to select
your type of idle valve:
• None - The engine can run without an idle control valve if the throttle is adjusted to prevent stalling.
• On / Off Valve - A solenoid that only opens and closes for a very basic open loop operation.
• PWM valve (2 or 3 wire) - Uses a pulse width modulated solenoid where changing the duty cycle changes
the valve position. 2 wire valves use a single solenoid and a return spring, while 3 wire valves use two
solenoids in a push-pull configuration. Common applications include Ford, Mazda, Honda, some Toyotas,
and most European cars that do not use drive by wire.
• Stepper valve (4 or 6 wire) - These valves use four separate coils to rotate a shaft, and have from 4 to 5
wires. Often used in GM, Chrysler, Mitsubishi, and Toyota vehicles.
The next box allows you to chose between open loop and closed loop.
• Open loop (warmup) - The valve opening amount is set as a function of coolant temperature, starting at an
open value with the engine cold and closing the valve as it warms up.
AMP EFI MS3ProUltimate manual version 1.203, firmware 1.5.0, 5/23/2017
5 SETTING UP A BASIC CONFIGURATION
Page 102