I have this problem too, you're supposed to let the car idle for a bit, or hit it with a hairdrier...then it will be fine.

You're just damaging it by starting, then slamming the throttle up...don't even rev it to warm it up faster, just tap the throttle up every 2 seconds, so it doesn't cut out.


The taking off thing, check your clutch bell, or your spur gear cog thingy, that might not be connecting properly. (Engine may have come loose on chassis, or moved.)