Mine does one other wierd thing that I attribute to the big injectors and lack of decent tune. If you run the car for a few minutes and then let it sit for more than 10 minutes, it takes like 20 seconds to crank it up and I can smell gasoline. Now, if you wait a day or so, it will crank up in like 1 to 2 seconds if not quicker. I've heard that mustang guys have this problem with bigger injectors spraying a little extra fuel after the engine is shut off and kinda flooding it like a carb might. You have any problems with this?