After my car is warmed up and I stop, turn it off and within 1/2 hour to an hour try to restart it, I have problems with it restarting without pressing the accelerator to assist the start. This does not occur when the car is cold.

I've been told this could be either a crankshaft positive sensor problem or a need to update the softwrae for this car. I do not have any other problems when driving, i.e stalling, misfires, back fires etc. I've replaced the spark plugs and cleaned the trottle body but problem still occurrs periodically on warm starts.