Hi, I have a Traxxas S-maxx 3.3 and it won't start at idle, but when I give it about 1/4 throttle it fires up. Also it won't rev at all when given any throttle. I was looking at some of the forms and they say there is a leak in the fuel system but I can't find one. The engine has had only three quarts though it after break-in. The needles are at factory. I was running vp racing fuel 14% oil and it was fine then switched to 9% because the hobby store did't have 14%. It fired up on the 9% for about 30 seconds then it died and has had the problem ever since.