A few things was the engine running before? Did you test the glow plug with your ignitor to see if it glows? Have you checked for leaks around the carb? Have you primed the carb? Do you have a 1 mm gap(to start) inside the carb take off the air filter to see, have you checked your lsn and hsn to make sure they are factory for now? I hope this gives a start from here we can help you more if this isn't one of the problems. What truck is it btw?Edit...Make sure your radio and truck are on when you look at the gap in the carb. Another thing make sure your exaust pipe is sealed and the header is tight.