Below you will find a list of frequently asked Power Commander question. If you
do not find a detailed answer to a listed question, or if you need more elaborate
information regarding any of questions here, or any that you might have, one of
our technical experts will be more than glad to answer these for you at 1-800-992-4993
Please read this file for additional information the Accelerator Pump feature.
The “SE” means Second Edition. The first version of Windows 98 did not
properly support USB devices. If you go into “Control Panel” in Windows
and double click the “System” icon the version number is displayed. If
the version number is 4.10.2222, it is the “SE” version.
The drivers required are found on the install disk for Windows 98SE. We
have also put copies of the necessary drivers in a folder named Win98
on the Power Commander CD.
A low battery will keep the PCIIIusb from communicating. The PCIIIusb
can quickly drain (about 20 minutes of use) a new battery, so make sure
to not leave it plugged in longer than necessary. Also, make sure the
cable is pushed all the way into the PCIIIusb’s port. Sometimes the
connector needs a fair amount of pressure to fully seat it.
Answer: The Power Commander USB needs to be powered up by either the
bike or a brand new 9 volt battery via the battery adapter. If the unit
is not powered up, the computer will only see a USB device being
plugged in, but will not allow the software to communicate. If a
battery has been plugged in for around 5 minutes, it may be too low on
power to allow good communication.
The software is not communicating with the Power commander,. Make sure
that the ignition switch is on, the kill switch is in position, and the
USB cable is firmly connected to both the Power commander and the
computer. Make sure that the unit is staying powered up (green light
will be lit on the face of the unit) and the your cable is connected.
The USB cable needs to "snap" into place. Applying ample pressure is
When adjusting the buttons, these changes will not be shown in the cells of the
All of the software, map files, etc., can be found on the web site at Power Commander
Select your bike model.
The USB cable is a USB to Mini-B cable and it can be purchased at any
computer store. If you would still like to purchase a CD you can do so
by going to:
Power Commander Replacement Parts Purchase
This message will appear if you try to load a map from a different make
or model than the Power Commander is connected to. (i.e. attempting
to load a Harley map to a Suzuki).
The button ranges of the Power Commander break your RPM up into thrids. If you are using a Power Commander then while communicating to the software press one, and the highlighted area will represent that button.
These errors appear to be communication related. Unplug the USB cable
from the programmer and switch USB ports on the computer. If the error
still comes up, try switching the USB port to another one and restart
the computer while the programmer is plugged into the USB cable. This
should refresh the USB port. Power to the programmer does not need to
The firmware did not load correctly and needs to be reloaded.
When installing the firmware, the "Update Settings" function of the firmware
loading process did not go through correctly.
Open the PCIII USB Control Center application on your computer, and go
to the "Help" menu at the top. From the "Help" menu click on "About
Power Commander 3 USB Software" to find your version.
Short term solution 1(recommended): Users need access the CD/Flash installer as an Administrator. To do this Right Click on the CD/DVD drive - Select Explore. When window with CD contents opens - Right click on Setup.exe and select Run as Administrator. This will launch the Flash installer with UAC turned off temporarily.
Short term solution 2: Bypass the Flash installer and run the PC3 setup file manually. To do this Right Click on the CD/DVD drive - Select Explore. When window with CD contents opens navigate to the FS Command folder and search for PC3Setup.exe. Once clicked Windows will ask you to block or allow select allow.
Short term solution 3: Customer to turn off UAC on their Windows account ( need to have Admin Rights). To do this The user needs to go to their Control Panel- select User Accounts. From there select their account profile. Once their account opens ther will be an option (if they have admin rights) to turn off UAC. They will then be required to re-Start their computer. Once complete run the CD as usual.
Long term solution: I will look into other ways to build the Installation CD, The FS Command method is outdated and prone to these type of problems. There are other ways to accomplish the scope of the installation CD but will require some time to deploy.
When the engine if fully warmed up and the bike is at idle the Control Center software should read 0% We have seen as high as an 8% variation in the throttle position from bike to bike. If yours is not reading “zero” at idle with the motor at normal temperature, then use the following procedure to correct it. In the Power Commander Control Center Software, go to menu “Power Commander Tools” and look for the tool to calibrate the throttle. The bike should always be running when setting the throttle position, as the voltage the sensor sends out can vary between when the bike is at “key on” and “motoring running”. The bike also needs to be at fully warmed up to its normal operating temperature. All you need to do is press "reset" while the bike running at idle, then quickly turn the throttle wide open till you hit the mechanical stop, then let go. Next press "Ok". You don't have to rev the bike out, the throttle just needs to go all the way to wide open and then back to idle.
Decel popping is caused by the detonation of unburned fuel in the exhaust pipe. This happens with high flow exhausts that allow more fresh air to be pulled into the pipe, causing the exhaust temperature to rise and detonate any unburnt fuel. Ways to reduce and possibly eliminate this popping are listed below and can vary between Harley-Davidson motorcycles and others. Exhaust leaks can cause decel pop, make sure the exhaust is sealed completely at the motor, and at any other connections. Harley-Davidson:
Metric and other:
- 1. For older Magnetti-Marelli fuel injected bikes, adjusting the fuel table to remove fuel can help reduce popping. Highlight the zero percent column from 2,000 rpm to redline and enter in values from -40 to -50. Run the bike and see if the popping has reduced. Sometimes, the throttle position may not show zero at idle and should be correctly adjusted with the bike at full operating temperature to make sure it is reading zero.
- 2. On newer Delphi fuel injected bikes, we have found that adding fuel is needed to reduce popping. Highlight the zero percent column and instead of using negative numbers, try adding fuel to the map. Start with putting a value of 25 in the cells and see if the popping has reduced.
- 3. Adjusting the ignition table could also help in deceleration popping. Advance the timing in the zero percent column 3 to 5 degrees to see if popping has been reduced.
- 1. Block off the fresh air injection systems. This will reduce the air being fed into the exhaust, causing the higher exhaust temperatures and detonation.
- 2. Many of today’s bikes (post 2007 or so) shut the injectors completely off during deceleration. If this is the case no adjustments made by the Power Commander, or any piggyback device, can help reduce this problem. On bikes that keep the injectors on during deceleration adjustments to the fuel table in the zero percent fuel column from 2,000 rpm to redline may help reduce popping. A value of positive or negative 15-40 should be added and can reduce popping if it is still noticeable.
Do not do any changes below 2,000 rpm due to the fact that it could affect fueling at idle.
- With the ignition off, hold down all three buttons on the Power Commander III unit.
- While still holding down the buttons, turn on the ignition and start the bike.
- Release buttons. The light(s) should show up in the last place they were left, by default the center two lights.
- Select the range you wish to adjust: Low, Med, High by pushing the corresponding button once, (these ranges are determined by taking the bikes RPM limit and then dividing it into thirds).
- At this point holding that button down will move the lights down (leaning out the mixture).
- Pushing the button repeatedly will move the light up (richening the mixture).
- When the two center lights are lit up this is the “0” setting.
- After making your adjustments wait 20 seconds before turning it off. This allows the settings to be saved to memory.
Using the 9V power adapter that comes with the Power Commander allows you to remove the Power Commander from the bike and bring it inside to your computer.
that the latest version of the PCIII USB Control Center Software is
installed on your computer and can communicate with the power commander
- 1. Close all Power Commander Applications on your computer.
- 2. Install the Accelerator Pump Utility to your Desktop and open it.
- 3. Verify that "Accelerator Pump Feature Enabled" is displayed by clicking on the
Enable Accelerator Pump Feature Button.
- 4. Close the Accelerator Pump Utility that is open on your desktop.
- 5. Open the PCIII USB Control Center Software that is on your computer.
Go to the "Power Commander Tools" menu and then to "Accelerator Pump
Configuration" to make the required setting changes for your style of
riding, then click OK .
On bikes that use an O2 sensor in the stock exhaust have a closed loop
area that can not be adjusted by the Power Commander alone. If you make
adjustments with the PCIII in the closed loop area the O2 sensor will
sense these changes and the ECM will alter the fuel curve accordingly.
If you want to have full fuel control over the entire RPM range of your
bike then you will need to bypass the closed loop area which the O2
eliminators will accomplish. If you are looking for the best fuel
economy and not worried about making changed to the closed loop area
you can leave the stock O2 sensors connected and still make changes
outside of the closed loop area with the Power Commander.
Most Power Commanders are powered by the injectors on the bike. When you turn the key on, the fuel pump gets power and primes the fuel circuit. When this happens, the injectors get power, and the Power Commander also gets power and lights up. After a few moments, the fuel pump has pressurized the system, and usually shuts off. If the fuel pump shuts off, the injectors’ loose power, and the Power Commander shuts off. If you attempt to start the bike when the Power Commander is off, the bike may take longer to start than normal, until the fuel pump comes back on. The fuel pump may come on instantly, after a few engine revolutions, or on some bikes seemingly not at all. If the fuel pump does not come on, the bike will not start. We recommend starting the bike once you turn the key on. Do not wait for the fuel pump to shut off, or a check engine light to go out.
No, all Power Commanders utilize a nonvolatile memory (it does not
require constant power to maintain it). The only way a map can be
“erased” is to use a computer to load a new one in place of it.
Because of the special compound used to seal the units, the buttons may
feel like they do not move, even though they actually do.
The most common problem we see with returned Power Commander is damage
to the wiring harness. If the Power Commanders’ wiring harness is cut
or nicked by the frame or sharp bracket it can short to ground. Once
this happens a number of symptoms may be present, overly rich running,
hesitation, stalling, etc. We suggest very closely inspecting the
harness for any signs of damage. Small cuts may be difficult to see. If
any damage is found, you can simply retape that area, unless the wiring
is significantly shorted.
No, the Power Commander is a fully sealed unit. It is not necessary to cover the unit to protect it from water. The most important thing to is to make sure the port plugs are used.
Make sure that the latest Power Commander USB software (Version 1.1.3)
is installed. If it is then try to reload the firmware into the Power
Commander. The firmware must be loaded into the Power Commander and
when you go to the "View" menu and "Power Commander Information", the
firmware version should show 2.0.4. Once all of the above items are
verified, an ignition table will show up when the ignition module is
Make sure that the ignition module is communicating with the bike by
showing a green indicator light on the front of the module once the
bike is started. If the light is red, connections may need to be
checked. The module should show green as soon as the bike is running
which will show communication with the bike. Reloading firmware may also help.
The ignition module may have been inline when programming the firmware
for the Power Commander. If so, the firmware for the ignition module
will need to be reloaded into it for the unit to come back on. Please
contact Dynojet regarding this process.
If the LED on the shifter is on and red, then the spacing is incorrect
and the shifter is engaged which will keep the bike from starting.
Change the spacing until the light is green and the bike should start.
- b. If the light is not on, then the placement of the wires in the white connector
on the shifters harness needs to be checked.
If you experience any problems with cruise control, or 6th gear indicator light on a newer Harley Davidson Touring bike with a Power Commander V installed. In the Power Commander software go to Power Commander Tools/Configure/Harley ECM Data. Uncheck the box next to Diagnostic Port Enabled. Click OK. Click Send Map.
Verify where the injector connectors have been hooked up. There are two
identical sets of connectors on this bike. There is a set next to the
fuel rail and there is one set next to the shock under the seat and
battery. If they are plugged in down by the shock, the unit will not
work. The unit should be plugged into the set next to the fuel rail.
Verify the placement of the Throttle Position Sensor wire tap. It
should be installed on the red wire with a yellow tracer on the GRAY
connector side of the ECU. There is a yellow wire with a red tracer on
the BLACK connector for the ECU that can easily be mistaken for the
correct one. Also, verify that the connector is securely fastened and
has not cut through the wire. If it cut through the wire, the Power
Commander still may get a throttle position signal, but it may be
If custom LED tail lights are being used, they may give off
interference up the line that causes the Power Commander to loose its
12 volt reference for power and shut off. The power wire (Red wire with
bullet connector terminals) will need to be relocated to a keyed, solid
12 volt power source.
The injector connectors have been installed into the secondary
injectors (on top of the air box), rather than the primary injectors
(underneath the tank).
The TPS connectors from the PCIII may be connected to the wrong
location. The Throttle Position Sensor on this bike is located on the
left hand side of the throttle bodies. There is the same connected on
the back side of the throttle bodies that is for the MAP sensor, this
is the incorrect location for the PCIII to be connected to. Please
verify in the instructions.
This issue can be related to improper placement of the ground wires.
The ground wires for the Power Commander must be placed exactly per the
instructions for the unit. Any other locations may not supply a secure
ground path and cause issues.
Verify where the connectors are hooked up. Start at the throttle bodies
and trace down to the first set of connectors that you come to. This is
the correct set. There is another set further down the harness that the
connectors will fit into. The correct set is on the left hand side of
Verify where the injector connector is plugged into. There is an
identical connector on the left hand side above the air box, right next
to where the TPS connector is located. The correct connector is on the
right hand side, between the #3 and #4 throttle bodies.
There is two sets of connectors on this bike but one is grey and the
other is black. The Power Commander needs to be plugged into the grey
one for proper operation.
These models have a rubber boot that needs to be transferred from the
bike's OEM connector to ours. This keeps water out of the computer and
if not installed, the sides of the ECM have openings that allow liquid
right into the circuitry. In some cases, the computer can be removed
and dried out for a couple days and it will function like normal, but
this is not guaranteed. Make sure that the rubber boot, if it was
installed, does not have any holes and is securely placed to keep water
out as much as possible.
The stock connector on this model does not have pins in every single
space and therefore Harley-Davidson put little rubber plugs in their
place to seal up the open spaces. These plugs still seem to allow water
by and it causes corrosion to start on the Power Commander connector.
We recommend putting di-electric grease in our connector before
plugging them together so that the moisture is blocked. Also,
relocation of the connector to under the right side cover, on top of
the ECM, may be beneficial.
Dynojet offers different maps for the US market and the European market
due to the differences in the fuels. In most cases the fuel available
in Europe will make a bike run much richer than the fuel available in
the US. For this reason we recommend that you use a map that coincides
with the region in that you live in. Although we have seen some
European maps work well for US bikes so it may be worth trying.