How does one test a dual port actuator?

[Freddie's Buick]

Does anyone know the procedure to test an actuator to check if it's working, leaking or frozen? This is a dual port design so one side I'd imagine uses pressure and the other vacuum. It's OEM so I think maybe 8-PSI on the pressure side?

 

[charlief1]

Don't worry about the port closest to the rod Freddie. It really doesn't matter. Take your mity vac and suck on the end one. This will tell you if it'll hold a vacume. If it does then put pressure to the same port to see if the rod moves. Go slowly so you don't blow the diaphram.

 

[Freddie's Buick]

Yep, pressure side is good, (holds vac and pushes the lever well). Vacuum port side doesn't work so I imagine it's toast. For the sake of caution I capped it in case it leaks.

Still no boost though. But it does go from 20 Hg to '0' in about a second. She's quick from zero to 45 MPH in about two seconds. I've not mashed the peddle to the floor since I'm cautiously a coward.

I guess the question here is how do I build up boost?

 

[charlief1]

Yep, pressure side is good, (holds vac and pushes the lever well). Vacuum port side doesn't work so I imagine it's toast. For the sake of caution I capped it in case it leaks.

Still no boost though. But it does go from 20 Hg to '0' in about a second. She's quick from zero to 45 MPH in about two seconds. I've not mashed the peddle to the floor since I'm cautiously a coward.

I guess the question here is how do I build up boost?

Boost is built under load Freddie. You may need to check and see if the turbo is spinning and not locked up.