When I first got mine going, I didn't use heat. It was fine for a few minutes idling, then it would start to sputter and run rich and spit drops of gasoline out the tail pipes. After that, it would take a few minutes to warm up and then no problem. Even now, my heat will completely turn off about 30 minutes into the ride. I do believe the plastic has some unexpected properties.
When I first got mine going, I didn't use heat. It was fine for a few minutes idling, then it would start to sputter and run rich and spit drops of gasoline out the tail pipes. After that, it would take a few minutes to warm up and then no problem. Even now, my heat will completely turn off about 30 minutes into the ride. I do believe the plastic has some unexpected properties.