because cen vehicles are based on the fun factor platform they share many common parts.... One of these common parts unfortunately is the steering servo and the radio/tx combo...... the servo should be replaced with a high torque servo... I used hi-tech hs645mg.... around 130 oz torque compared to probably 50 for stock..... The car will turn tighter than you can imagine....
Also, replace the radio/rx system... it will eventually die on you..... It may also be part of the problem....any 2-3 channel will work fine.. go with fm... less problems.. Don't buy a package system with cheap servo's.... you won't solve your problem... The hi-tech servo only costs around $40-50 dollars...