Coolant Pressure Test Kit for NSX

Didn't work...because the adapter didn't fit? I'll have to verify, but I'm guessing all acura caps fall under 1 or 2 interface types. I have a good MityVac system. I don't recall if any of the included caps fit the NSX, but I know they sell adapters for most cars on the road.
 
The adaptor didn't fit. The manual shows all the vehicles it's compatible with, lists the Legend but does not list the NSX, bummer.

One of the adaptors allow me to plug in the pressure cap. When I do, and hook up everything as best as I know (seems to seal up well), when I pump it, the pressure does go down pretty quick. I want to suspect that I'm just doing it wrong but I don't see what I'm missing. What I noticed however is that it leaks air in a tiny hole (by design) on the adaoter which has me confused? :confused:
 
I'll give it a test when I get home later. There are 2 caps listed for Acuras. There's the one for the Legend and other cars, and another for the '90-'93 Integra. The NSX is not listed in the usage guide I have, so we can only hope it's not a sign that the NSX is a unique one-off. I would guess the interface is common with other styles out there.
 
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