Hello 440mag, thats what I thought at first too. But It was coming from the highest point and there are no fittings up there. So when I pulled that section off and ran water through it to check it it was seeping from a few different spots. You could hear the air too. The only thing I can think of is the last few tanks of racing fuel I got was from Sapp BROS. And they use the same pump for kerosene. And I could smell a slight kerosene smell from the exhaust. But I really have no clue. Now I'm forced to buy that Rons terminator kit