andresj

iTrader: (8)

this is the problem i found in my actuator what does this lead to?

im super new to rotary =]

azdk

thats an n/a right cause i wanna say it opens the 5th and 6th ports but

m1northreat

its na. so what happens if the pin is missing like the one in the pic? can it possibly stop the car from starting up?

turboIIrotary

iTrader: (9)

nope it only ruins you low end if stuck open or will ruin your top end if stuck close

pfsantos

iTrader: (1)

That's the 6PI (6 port induction) actuator for the front rotor. It won't prevent the car from starting. As you have it, the valve could be in any position, and isn't opening/closing at the right time. Post above shows result.

(Search terms so I can find the picture in the future: 6PI actuator picture rod auxiliary valve)

crazyasu

oh NooOoo...I seem to have lost 30hp where did it go...???

Shainiac

iTrader: (7)

There should be a pin with 2 e-clips holding it in place. Just buy an actuator at the junk yard with one still intact and your set.

Remember to put RTV or a new gasket where the actuators mount to the manifold!
After I fixed my actuators a long time ago, I forgot to do this and still couldnt figure out why they werent working.
They need to seal to the manifold.

pfsantos

iTrader: (1)

To test whether the system is opening the valves apply grease to the rod. If the actuator shaft moves in, the grease will move. I think the system opens the auxiliary valves around 3800RPM, assuming you have the rest of the parts of the system working fine and not seized.

Shainiac

iTrader: (7)

^ I had trouble using this method since the actuators are so close to the exhaust manifold.
Instead, I used a small hand pump for a foodball and a piece of vac line to make sure it kept a seal.
Worked well enough for me.

crazyasu

The auxiliary port valve system allows a better flow of intake air by opening an auxiliary port in addition to the primary and secondary ports. The opening of the auxiliary port is controlled by the auxiliary port valve. At low engine speeds, the auxiliary port is closed. When the engine speed is high enough and under certain conditions, the valve starts opening the auxiliary port.


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This above describes the operation of the auxiliary port valve system. The pressure line going from the air pump to the actuator exists only on the mazda rx-7 89-91. On the 86-88, the pressure line to the actuator is teed into the split air pipe (see emissions section under secondary air injection). When the auxiliary port valve rotates, the auxiliary port opens. The more the valve rotates, the bigger the actual port opening becomes. The rotation of the valve is controlled by an actuator which is itself pressure controlled.


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This above shows the split air pipe and the pressure line to the actuators on the mazda rx-7 86-88. The actuators see a pressure equal to the sum of the pressure in the split air pipe (coming from air pump operation) and the pressure in the exhaust pipe itself (at the level of the main converter). It appears that air is injected into the split air pipe only under medium load (below 3,500 rpm). This means that under any other condition, the pressure needed to activate the actuators comes from exhaust pressure only.