I am about to pull my hair out. this is going to be a long winded problem, but here goes. I have a ECX Torment, put in a high speed servo, had glitching problems, could not figure it out. bought a ECX boost to race in stock boost class. Decided to swap out the radios in both cars, since the torment was being parked and the boost did not have a 2,4ghz radio. talked to lhs about truck, they said install a voltage protector on the truck. the glitching problem was fixed. Now tried to run my boost (with the radio that was installed in truck with high speed servo). car runs a minute or so, stops barley goes forward(goes backwards faster) then stops. thought maybe bad battery, low charge, etc. Put battery on charger and it showed that it 7.05 volts( should be enough to work, since it is a 7.2v battery. Not sure what to do next. It is really fusterating. Even the truck only runs a couple mintues. my charger shows then have charges on them. Is it radio problems, charger issues( hope not just bought it a month ago), or something else.? Really do not want to take 2 cars to my lhs to be looked at, they charge extra if they know you did not buy it there to look at it. Someone please help. i am new to rc and want to eventually race, but this is frusterating to me. thanks.

After switching radio you should calibrate the ESC to it. After that try running with a fully charged the battery.

How do you calibrate the speedo to radio? Thanks

Calibration is teaching the ESC the full throttle, full brake and neutral points of the radio, but the sequence varies from esc to esc. The manual should have the precise info in it.

What if I take the original esc's and match them back up with original radios in the new cars, will that fix my problem. They are the ecx1070 esc, which is a non programable esc.