Current problem: van wont start, hardly fires, smells rich, pumping throttle makes it worse, holding choke wide open only helps slightly but still wont start. Brief history: Bought bc no compression and carb was gushing fuel. Messed with float, fixed gushing, adjusted valves fixed compression. Ran for a while but never right, and has gotten worse to present state. Have completely disassembled and cleaned carb, new rubber in it, new needle (old was bent!!), new spring, lots of new parts, STILL no joy. Pretty sure it's too rich to run, starting fluid makes problem worse, and I've had to run with the 'fine AFR adjust' screw almost all the way out for it to run at all... till now, nothing. And yes, I've been through the carb tuning thread, and know how all the adjustment screws work. Possibly related: the fuel tank seems to pressurize quite a bit when temps rise (normal action w/ charcoal can?) and aftermarket low PSI fuel pump (which weeps fuel when temp rises) I dont even know what the heck to do with it now.