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Troubleshooting Your Nitro 4-Tec
The following section addresses some very basic engine and
radio questions you may have about your Nitro 4-Tec. Most
questions arise from simple user errors or minor adjustments that
are easy to correct. If you can't find a solution for your Nitro 4-Tec
here, then visit our Web site at www.Traxxas.com and click on the
Customer Support menu.There you will find a much more
extensive and detailed online troubleshooting area. In addition,
you may call Traxxas Customer Service at 1-888-TRAXXAS (outside
the US call 972-265-8000).
Radio system does not work properly:
Short radio range:
Engine will not spin (EZ-Start will not turn the engine):
42
If the power light on the transmitter does not come on, check
for proper battery installation and that the batteries are new
and/or fully charged. If the power light is blinking, then the
transmitter batteries are weak and should be replaced. See
page 13 for more details.
If the transmitter light is on but the radio is still not
responding, check for proper installation of the receiver
batteries and that the batteries are new and/or fully charged.
Check to make sure the on/off switch on the model is in the
on position. Finally, if there is still no response check the red
and black wires that connect the battery pack to the "batt"
terminal on the receiver (you will have to remove the receiver
cover). Make sure the wires are not pinched or damaged and
that the plug is secure in the receiver. See page 14 for more
details.
If the radio range appears short, then first check to make sure
the transmitter antenna is fully extended and that the
antenna in the Nitro 4-Tec is in place and has not been cut or
damaged. Next, make sure the batteries are all fully charged.
Finally, if you are still experiencing short range, try a different
location. Sometimes there can be interference from various
sources that can cause your radio to malfunction.
If neither LED on the controller lights, the EZ-Start battery
could be discharged or improperly connected. Inspect and
recharge if necessary.
If the glow plug LED lights and the motor LED does not, then
the EZ-Start controller is in protection mode. Allow the
controller to cool for at least three minutes.The circuitry
should automatically reset.
Check to make sure the wires are connected to the EZ-Start
motor in the Nitro 4-Tec.The red wire should connect to the
positive motor terminal, indicated by a red dot next to the
terminal.
The engine could be flooded. If too much fuel accumulates in
the combustion chamber at start up, the engine will
hydraulically lock. Follow the procedure on page 40 for
clearing a flooded engine.
Check for binding at the engine flywheel. If you are not able to
turn the engine by hand, the engine could be flooded, there
could be binding in the clutch system, or there could be
internal engine damage. See page 43 for info on clearing a
flooded engine and releasing a stuck piston. (Note: It is normal
for the engine to be extremely tight and hard to turn when
the piston reaches the top of the compression stroke.)
Engine extremely sluggish, hard to start, and will not idle
during tank 1 of the break in:
It is possible that the factory adjusted break-in settings on
your carburetor are too rich for your geographic location,
atmospheric conditions, or fuel brand. Extremes in
temperature, humidity, barometric pressure, and altitude can't
always be accounted for with a single high-speed needle
setting.The symptoms described above can occur when the
air density is very low such as in high mountainous elevations,
and extremely cold temperatures. Under these conditions,
lean the fuel mixture slightly, 1/8 turn, to see if there is any
improvement in starting and idling. Only lean the fuel mixture
just until the engine will run and idle reliably and then
proceed with the break in.
The contents of different brands of fuel (other than Traxxas
Top Fuel) in combination with extreme atmospheric
conditions can also make the factory preset break-in settings
too rich and cause the symptoms described above. Again, try
leaning the fuel mixture slightly, 1/8 turn, to see if there is any
improvement in starting and idling.
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