I know about that.....put a Fantom FR18 in my 1st Tmaxx - wow, incredible power! Wouldn't run without igniter plugged in! I did everything you could think of, tuned it all over the planet, diff plugs, diff heat range plugs, anything and everything - nothing helped. Finally pulled motor off and as soon as backplate came off - saw why - half the bp gasket was gone, big air leak!

Just gotta walk away sometimes and start fresh again, later!