Troubleshooting - Engine chokes or stalls under acceleration and at speed
Article #542289
  1. Out of fuel
    Fill fuel tank
  2. Fuel level is low
    Refill fuel tank
  3. Glow plug fouled or weak
    Check for the glow plug light on the handheld starter when the EZ-Start® button is pressed. No light indicates a completely shorted plug or loose connection. Replace with the correct Traxxas glow plug for best performance.
  4. High speed needle too lean
    Richen the high-speed mixture. When using fuel with 10% nitro the hi-speed mixture setting should be 1/2 turn leaner.  When using 33% nitro the hi-speed needle mixture setting should be 3/4 turn richer. TRX 2.5 / 3.3 or Pro .15 engine.
  5. Carburetor incorrectly adjusted
    Readjust carburetor to factory break-in settings and tune your engine for performance. Retune your 2.5 / 3.3 or Pro .15 engine.
  6. Fuel flow blocked
    Check that all fuel lines are clear with no pinhole leaks. Check for dirt blockage in the carburetor fuel inlet and high speed needle seat.
  7. Air bubble in fuel line
    Prime the engine to force air through/ Check for pinhole leaks in the fuel line
  8. Insufficient fuel tank pressure
    Replace the pressure hose (between pipe and fuel tank)/ clear blockage in the tuned pipe hose fitting/ check flow to and from tank/ Check seal on fuel tank cap
  9. Tuned pipe damaged or incorrect
    First, verify that the tuned pipe flows freely and is not restricted. Some aftermarket dual exhausts do not produce enough backpressure to maintain proper fuel supply to the engine. Replace with proper tuned pipe.