I would like to test my fuel pressure. I have a pressure test gauge and would like to buy a Honda test hose or a metric adapter to connect the gauge to the m6 port on 94 accord. The honda dealer I called said they do not sell the gauge or hose. I have tried to find a metric adapter from all the hardware stores around me and no success. Does anyone know where I can buy a metric adapter? I found a Honda hose online. But, it is really expensive. Thanks in advance.