Car Stutter Before Movement

[TamiyaUpgrader]

I don't know if anyone can help with my problem,

but when i put my car on the ground (and yes my battery is fully charged) my car starts to make a stutter movement before finally moving off properly, but it also makes a slight grinding sound before moving off aswell, i've taken my car apart, regreased all my metal bearings, made sure the motor is in the right position so that the pinion gear doesn't slide, so i'm pretty much stumped as to why my car does it, the only thing i can think of, is that there is too much weight but i don't see why it would be such a problem, it also does it with a brand new battery aswell. I did upgrade the car with a brushless motor, but i can't see what the problem would be as it was pretty much brand new when i bought it.

I really hope someone could help recommend their ideas!

Thanks.

Neil.

[cubsfan2009]

It's called 'cogging' and is common with sensorless brushless. The cheaper brushless (Ezrun) setups do it worse than the more expensive ones (Castle). Check if there is a firmware upgrade for the esc if you can hook it to a computer.

[TA-Mark]

Set your motor advance timing closer to 0. High advance setting will cause cogging on take off. Also try different start power settings if the ESC has them.

Ensure the FDR and Rollout are correct for the Kv of motor you are using. Overgeared will also cog.

[TamiyaUpgrader]

Thanks guys i've sorted the problem now!

[tamiya monkey]

What car have you got it in, also what make and model of brushless system have you installed, and finally what gearing and battery are you using.