problem is that with the engine at iddle its should be reading -10 or close as it reads using Internal sensor and it dance around -.05. I did change the setting From I to E. I also used the same vac/boost hose that I use for the Internal one that was working perfectly. so dont think is the HOse.. any other idea my friends?

 

Where is the vacuum line installed/hooked to on the engine? Try disconnecting the vacuum line at the sensor while the engine is running; make sure that it pulls a vacuum (suction) on the vacuum line while idling. The engine may also idle up when you do this. If it doesn't, then you didn't install it on a source after the throttle body on the intake manifold, where it needs to be.