Originally Posted by madweazl

Just built a Cat SX3 and transferred the RS Pro I had in a stadium truck to this vehicle. I run Hitec 7940s in all of my 1/10 vehicles with a Radiopost radio and havent had any issues until now. When I was dialing in the endpoints and trims, I noticed the light on my transponder was dimming while I was turning the wheels left to right. After doing a couple figure eights in the room checking things, the receiver lost signal and became unresponsive. If I power off and back on, everything powers back up.

My first thought was that perhaps the capacitor installed on the ESC had failed so I replaced it but that didnt correct the issue. I reflashed with 223 and reprogrammed the ESC but that didnt change anything either. If I give the car a bit of throttle and turn the wheels the motor RPM drops significantly and stutters a bit until I straighten the wheels. If I apply more throttle the condition will sometimes go away as well. This unit work fine in the stadium truck with the same combination of motor, servo, and receiver. I unplugged the transponder, no change. Tried different batteries, no change. Tried another servo, no change. I havent replaced the receiver yet but it seems to be working properly.

Any ideas on what may have happened? The ESC gets fairly warm just turning it on and giving some rapid steering inputs (~100 degrees). I dont know if this happened in the past or not as I never checked. Other than the brownouts, it seems to function normally. No fault lights and the sensor lights all indicate that they're working properly.