So, twice since I have owned the ZHP I go to start it and have issue. The car idles extremely roughly between 600-1000 rpm. When I give it gas it will rev just a bit, then die when I let off. On the third start the car was perfectly fine. The first time this happened was almost a year ago, a month after I bought it...and I can't remember the circumstances. But this time, the car had not been started in 3 days (other than for 5 seconds the day before to move the car over to get the lawnmower out). Is there some kind of issue with these cars if you start them and not let them warm up or run for a bit?