I have to admit, it took an effort to keep it lit and to get it started for the first time through one tank. But after that, the engine was fabulous. It stayed lit through the rest of the two tanks at idle and I started to drive the car around and lean out the needles. It is a very responsive engine and very impressive. It is easy to tune just like the other os engines. So far I have 7 tanks through the engine and it is a screamer, but the true test for me is on Sept. 5th, when I take it out on a track. I think that I prefer this engine over my MT12 mod any day. At least for now.