Shown below is the new hand-held LCD programmer which plugs into the ECU via a six foot cable. This unit takes the place of the laptop used on most other programmable systems. The PGU uses a membrane switch keypad in place of the pushbuttons on earlier units. A fast forward scrolling button to quick scroll at 20 frames per push.
The programmer contains seven push-buttons used to select and change functions. The < and > buttons allow the user to scroll left or right through the parameters. The +1, -1, +10, and -10 buttons allow the user to increase or decrease the value in the lower right of the LCD window. The value may be any number between 0 and 255. The larger the number, the more fuel that will be injected at that parameter or range.
The picture on the left shows the RPM FUEL parameter at 4750 rpm with the fuel value set at 91. By hitting the +10 button once, the fuel value can be increased to 101, as shown in the picture on the right, thus richening the mixture at 4750 rpm.
Holding down any of these six buttons for more than 2 seconds permits you to advance ranges or values at the rate of 8 per second until the button is released.
The gauge button permits instant access to gauge 1 mode which displays manifold pressure, RPM, air temperature and water temperature.
Gauge 1 mode, shown above, allows the user to see where the ECU is currently operating to aid in tuning. Pressing the GAUGE button a second time returns the LCD window to its previous parameter and range to allow speedy adjustments without scrolling through the entire menu.
Gauge 2 mode, shown above, displays the mixture knob position, injector duty cycle, acceleration enrichment and ignition timing.
Gauge 3 mode, shown above, displays battery voltage and throttle position for setting fuel cutoff limits plus optional fuel flow.
Gauge 4 mode displays rpm, MAP, O2 voltage or AFR and ignition timing
The programmer permits access to all fuel and ignition parameters. Fuel and ignition timing with regards to manifold pressure or throttle position is adjustable at 64 steps, rpm fuel and ignition timing in 250 rpm increments, acceleration enrichment, cold start, warmup, knock sensing, fuel cuts, closed loop and various relay drivers are all adjustable through the LCD programmer.
Most programming is done with the programmer in Gauge 1 mode. This allows the operator to see where the ECU and engine are currently operating. By using the mixture knob and feeling where the engine runs rough or with the aid of the recommended air/fuel ratio meter, adjustments can be made at each step until a satisfactory engine map is generated. When properly programmed, the ECU will deliver the correct air to fuel ratio under all conditions for proper running. Units are shipped out with a full map installed, taking into account engine displacement and injector flow rates. This normally permits the engine to be started up with minimal problems. From this point, the operator can start fine tuning the system by following the detailed installation and tuning manuals provided.
EM-4 Installation and Tuning Manuals
PDF versions below approx. 1Mb file size. Time to download 1-4 minutes depending on connection type.EM-4F supplement for 4F and 6F manual PDF
EM-4F for 8F supplement manual PDF
SDS EFI Supplement for Aircraft Applications
EM-3 Installation and Tuning Manuals
For the EM-3 we recommend using the EM-4 manual, however there are a few differences.
The EM-3 knock sense parameter will only adjust from 1 to 16, whereas the EM-4 can adjust from 1 to 32.
The EM-3 cannot support the new nitrous retard, and A/C aux input features.
The EM-3 does not have a 5 volt tach output on the main harness connector.
Otherwise programming, tuning and hookup are the same on both models, and since the EM-4 manual has been rewritten
it is the best choice for the EM-3 owner to use.
EM-2 Installation and Tuning Manuals