Ronnie, you are correct, there is no fuel prime on the SimJet (maybe that will change in the future). On a new install, (lines empty) I usually initiate a start sequence and let the pump start moving fuel towards the engine. I will then stop the start up before the fuel reaches the engine. I will then initiate another start-up and away she goes.

My understanding is, the line has no fuel and as the ECU is ramping it is not seeing an increase so it increases the ramp slightly and in some cases by the time the fuel reaches the engine, it is a little too much to handle and will give some flames. I have done starts without the above procedure, but I prefer doing it the way I stated.

Not sure what ECU you have. Do you know if it is the lastest? If it is 2 years old it should be fine. One way to know is, that if your's is (IR) capable, then it is fine.

Sounds like you found your culprit though, good luck.

George