OKay so I have this cheapo rc car that I mess around with. I recently installed a new motor into it but When I did i lost range. I put capacitors on and i'm pretty sure i did so properly i just can't figure it out.. Help please :) Also please dont tell me to just go out buy hobby grade cars, I also have two E-revo VXLs
most likely the motor is using to much power from the battery and causing your receiver not to get enough so u may need higher resistors or bigger battery. Although i do not know much about RC car electric circuits and what not that would be my guess.