How to check turbo control solenoid valve
 

I have buy brand new from mazda turbo control solenoid valve and I try to check it to be sure that the new is working and I think that it doesnt.
I connect 12v battery then i connect pressure out of mityvac to port a and pressure gauge to b with 1metre hose.
I press air 12psi then I disconnect the battery but the solenoid valve did not release the pressure and stack if I hit it a little then release the pressure.
I make somethink wrong?

Read down to the end of this:

http://rx7.voodoobox.net/howto/solen...oid_check.html

This is not a turbo control solenoid valve.
Is difference from other.

Are you sure you are applying pressure to the correct nipple? Page F-93 of the FSM also has a test procedure.

There are two turbo control solenoids, BTW - one for vacuum, one for pressure.

It is almost the same with (f93 service manual page )solenoid valve but the turbo control have one more nipple but the a,b nipple are the same.
By the way this is vacuum valves on page f93?
If yes maybe and the turbo control valve is vacuum too and I test it wrong.

You want to run the test on F-177. F-93 is for a on/off solenoid. The turbo control solenoids are switching solenoids. The turbo control vacuum solenoid (the one with the metal body) has a 3rd nipple hidden under that black plastic cap. You don't need to remove the cap to test it, but it's there.

See this pic to show how to test that solenoid using the tests on F-177 and on Dave Disney's site.

Dave

If I test it like f177 page or like dave the valve didnt work.
I think that maybe is a vaccum valve.

The valve should pass the test regardless of if you apply vacuum or pressure. Basically, B opens to port C when the voltage is off, and B opens to A when voltage is on. You don't have to use a full 12v, in fact a 9v battery works pretty well.

If you want to 'stress' test it, attach a chamber on port B. (An actuator works well for this). Turn on the solenoid with 12v, and apply pressure to port A to fill the chamber. Then turn off the solenoid. If it is working properly, the pressure in the chamber will vent through port C. For each solenoid, there is a pressure that causes the internal plunger to stick and not vent the air. For a new turbo control solenoid, it should vent the pressure consistently with up to 15psi in the chamber. If this maximum pressure is less than 12psi I would say it is a bad solenoid.

Dave