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I just felt the need to fess up...You sir, are correct. I was wrong.Today I had the opportunity to see what you were talking about.On the Viper "winter" engines, they loop the return hose from the purge pump back into the air cleaner and squirt fuel directly into the throat of the carburetor. On standard Viper engines, they return the output of the purge pump back to the fuel tank.I stand corrected and apologize for the "misinformation" Q