I'm having a problem I hope someone can assist me in troubleshooting, and I didn't find anything similar in the previous 35-odd pages of this thread.
The car is a new Losi XX4we running 3800 batteries, using Spektrum (Futaba) module in a 3PK, with a s9550 steering servo. The receiver is on the top deck of the chassis tunnel, and the antenna is exiting the top hole from the Rx case and is trimmed to 3.6". The ESC is a Tekin G10PRO+. The motor is a Checkpoint 10x2. Wire connections are Trinity R-Minus bullet connectors and hard-wiring. The system also has a PT installed, as well. All electronics (running different batteries and motor) have been fully functional in a 12th scale 4-cell 19T car indoors all winter with ZERO issues.
While setting up the car in the house, as I have done with my 2wd car with the same setup, I have experienced an issue that I'm not sure is Spektrum related or not.
From a dead stop, launching full throttle on carpet to test the diffs and slipper, the car spurts forward, dies and loses steering. Rolling on the throttle eliminates the issue. If you hold the throttle down, the car will do this once, then again in a 2-3 second pattern; i.e. lurch then die, pause, then lurch then die, pause, then lurch... etc. When the overload is happening, the steering is void. As long as throttle is not MASHED from a dead stop, the car works flawlessly. It feels like a voltage spike, to me, but it seems to be overloading the radio feedback and going into a saftey or failsafe mode. It may be the 3PK (it has a failsafe built in), but the radio setting right now is at a default.
I swapped receivers with full antennas as well as shortened ones, to check to see if maybe that was an issue, and it still does it. I installed a 4700µF cap in the "AUX" socket of the Rx and it still does the same things under a heavy load. I have checked the Tx module for the wire routing, and it was running across the board, so I re-routed it under as described by Spektrum and others, and the problem still exists.
Yes, it would be easy to say, "well, then just don't mash full throttle ever," but that's not a solution to a problem in my opinion, but a BandAid. I'm wondering if anyone has experienced anything similar, and knows of a work-around, or is this something I need to take to Spektrum CS directly? I'm out of ideas and/or brainpower.
doug