So, I had the alternator rebuilt to save some $$, and I got it back in. Got everything back together, and it still won't fire. I disconnected the fuel line from the carb and cranked it. It had plenty of fuel coming out so it know the pump works. The odd thing is that I fired briefly with starter fluid, but died immediately. I am just super confused here. If I have air, fuel, and spark...what's keeping this think from starting? I've done the cap and rotor, new battery, new ignition coil, fuel filter, and fresh gas.