radicalfil

On my 72 911T w/ MFI I noticed that when I pulled the vacuum hoses from the MFI that there was a distinct difference in the amount of vacuum from the right side vacuum fitting vs. the left side vacuum fitting. I noticed this because when I removed just the right side vacuum hose from its fitting there was no difference in the idle. However, when I removed the left side vacuum hose the idle increased as per the instruction of my new timing light. I out my finger on the little tube on the right side manifold and could barely feel any vacuum. Then I put my finger on the left side vacuum tube and it seems as though all the vacuum is being create from this side of the MFI> QUESTION: Is this normal or do I have a vacuum leak on the right side of my MFI and could this explain the loud clicking I hear in the area of number 4's injector air stack. Note: Timing is dead on and valves adjusted correctly but the damn thing barely idles at 400 rpm without the help of the manual throttle. Any help would be appreciated.
Phil Deering
72 911T Targa