I have a 3.3 in a nitro sport that is nearly impossible to start. I have readjusted the carb to factor settings. I have tried 3 different glow plugs and checked for leaks. It has ez-start, I'm running a new gallon of byron's 20% nitro. Once you get it running it's stupid fast and doesn't stall or anything. I had no trouble until I let someone else drive the car for 2 tanks. Any suggestions?