on going from my thread the other day, i have now installed a pipe off my manifold but still no signs the servo is working. i have verified that the stop valve is correctly installed. i have sprayed brake fluid onto the manifold to see if i had not sealed that correctly and also around my new pipe joins and the engine idle did not increase. i have yet to do this test on all the joints underneath but one thing i have noticed is that when i pump the brake the idle increases a little. i have read that tyhis can be an indication that i'm running a bit rich but that aside could that indicate anything? following on from that i disconnected the vac pipe from the servo and could feel a good suck from the engine when blocking the pipe end with my thumb. i also observed that the idle decreased when i did this. can this indicate anything? can anyone offer any advice on any of this, or is it that the engine idle increase/decrease is not related to my servo at all nor does it indicate any potential vac leaks? the servo itself looks pretty old, and i tried sucking a pipe from it and then sealing with my tongue but there was'nt really a noticeable suction when i released the seal.