I am not familiar with your previous post off hand. Not sure why your certain that one specific cylinder is not getting fuel but if this is truly the case it has to be bad injector, connector, wiring or driver (ecu).
Mechanic stethescope on injector will tell you if its working or not. They are very loud when working. This will not tell you flow rate or pattern though.
Mechanic stethescope on injector will tell you if its working or not. They are very loud when working. This will not tell you flow rate or pattern though.