When cold (below 50 degrees) the engine cuts off when it gets to about 1000-1500 rpm's. Sometimes it will stay running if you are accelerating slowly and take your foot off the gas quickly. As the engine gets warmer it cuts off at a littler higher rpm. Sometime it starts right back up if you put it in neutral while rolling, restart it, then back to drive, Other times you have to turn the key off and restart it. As the engine warms up the rpm's at cut-off gets higher. After driving about 5-10 minutes it is fine. It all depends on the temperature of the engine. Went out one morning when the temp was 27 degrees and it almost didn't stay running. I had to start it about 5 time for it to stay running.