It sounds as though you're dumping so much fuel into the engine that it filling the crank case. You may want to change the oil before going any further, just to be on the safe side.

If that's the case, then you are REALLY putting fuel through that thing. Check out the regulator as someone suggested in your previous thread. If there's fuel present in the vacuum line, the regulator is shot. However, if there is NO fuel there, the regulator may STILL be shot. A pressure guage connected to the injector rail is the proof-in-the-pudding.

If you disconnect the fuel return line and then turn on the ignition to pressurize the system, you should get some fuel out of the return line. If you don't, the regulator is likely bad.