I've got a 89' R32 GTR and ever since I've had it the Air Con hasn't worked. I found that a part was missing in the gas steel hoses for the air con at the front of the car in the middle. It looks like the part was supposed to convert a large hose to a small hose as both are different sizes and have thread on them. I can only assume that the air con is empty and would need a refill to get it working as well, but it would be handy to know how to test this.
Could someone take a picture under the bonnet at the front, center where the air con pipes connect?