Ok I got a strange coolant leak at the back of my manifold. I was thinking it was a intake gasket leak or a crack in the intake but after pulling the air cleaner for a closser look it appears that I have a hose that runs out of the upper water pump plug that usually isn't used that runs through the TBI adaptor and then becomes the inlet to the heater core. What is this for? Preheating the fuel for some emmisions reason? I am going to bypass it as the threaded pc in the back of the adapter is what is leaking and I see no benefit of running through the adaptor. Am I wrong?