Hello there, I have 4 T2 troopers, 2 of them start and run like Champs, 2 of them have the issue. They will crank and crank but not start. Takes about 20 to 30 minutes to get them going, then they will run all day long and fire up at will every time. It's just the cold start they have a problem with. Since I have 2 that run good, I have swapped every part you can think of from the fuel system to ignition system with no success. I'm pretty stumped and am looking for any advice