I just replaced the fuel tank in my nearly new Rustler. It was cracked and I had no fuel pressure. Now I try to prime the carb and I get no fuel delivery to the carb. I pull the line and get fuel out when I prime it. Should there be a vacuum at the carb? What I mean is does the carb draw fuel into the combustion chamber? Could I possible have a plugged carb on a Trcuk that just has 4 tanks run through it? HELP!!