i have an 87 n/a with the racing beat presilencer, and no air pump. my ports were not working so i thought my problem was that there was no seal on the actuator gasket. i put some rtv seal on them and they still don't work. both the actuator and the valve it connects to both move freely. what could be my problem? this has turned into a two week project, and at this point i am completely stumped on what it could be.

 

The tube from the presilencer is intact?

 

Mazda calls them the auxiliary ports, or aux ports.

To test them, run a tube to the actuator, T in a pressure gauge and blow into the tube to check at what pressure they open.
(A cheap boost gauge will do.)
Then reconnect the pressure tube & T in a long tube to inside the cabin, with the gauge on the end, and do a test drive to see when they open.

 

First step - What do you have connected to the actuators to make them open?

 

there is a tube that goes from the presilencer all the way to they tube that feeds the actuators.

 

This must be the most stubborn 6 port setup in the known world, if it is causing this much trouble.

 

Do you have a bicycle tire pump? If you cut the valve off the end, the hose will slide right over the thin diameter metal tube which is now connected to the pre-silencer with a rubber hose. The tire pump will operate the actuators very easily with one stroke. (I've done this.) That'll verify that everything from the tube to the actuators is working properly. If the actuators open using the tire pump, then then problem is between the pre-silencer and the inlet tube. If they don't open, then either the actuators are shot (unlikely IMO) or the passageway within the manifold to the actuators is blocked. I tried just blowing into a piece of tubing to open the actuators, but I couldn't generate enough pressure. I believe 3 psi is required to open them, and the pump will do that easily.

 

do an electric port conversion then, if they move freely.

 

And ADD a pump back to the car? Forget that!

 

you can use a regular seat lumbar pump!! you only need like 2-5 psi to open the actuators!! I used one from an Ford Explorer and add a RPM switch with some relays. Piece of cake.