[jbertino]

Originally Posted by jbertino

Wouldn't the car need vacuum to keep the gate shut. When the car is off it has no vacuum so it's open

Also I took the vac canisters out to check for cracks . I reinstalled them but there is no vac in the system could that be why the gates are leaking ?

[007_e350]

Originally Posted by Dmacc

You should be pulling slightly more vacuum than 21, somewhere around 25-26 is normal from what I've noticed.

+1 .. I pull -26 mm HG

[007_e350]

Originally Posted by MM Performance

if its leaking at the WG actuator your WG actuator may have a tear in the diaphragm or the hose going to the actuator is disconnected or has a tear.

ECS sells actuator for like 30 bucks, it would be a b*tch to install though (esp front)

[MM Performance]

Originally Posted by jbertino

Wouldn't the car need vacuum to keep the gate shut. When the car is off it has no vacuum so it's open

Open is just the position of the flapper valve. The wastegate actuator that controls it is a sealed system that must hold vacuum in any position of the flapper

[MM Performance]

Originally Posted by jbertino

Also I took the vac canisters out to check for cracks . I reinstalled them but there is no vac in the system could that be why the gates are leaking ?

Turn you car on and run for 1 minute. Turn off and after turning off wait 1 min and disconnect one of the lines to any vac tank. If it doesn't sound like it has vacuum when you pop off the line then you have a vacuum leak somewhere or the wastegate actuators themselves are leaking

[jbertino]

Did it it has pressure when I take the hose out.

[MM Performance]

Originally Posted by jbertino

Did it it has pressure when I take the hose out.

Try again but wait for 5 min after turning off car. If it still has vac you def don't have a vac leak

[jbertino]

Originally Posted by MM Performance

Try again but wait for 5 min after turning off car. If it still has vac you def don't have a vac leak

Just did it waited 5 mins still had pressure

[Dmacc]

Originally Posted by jbertino

Just did it waited 5 mins still had pressure

I'm thinking you may have a boost leak. I saw Tony's reply to your boost leak test, you might have a leak from chargepipe to turbo on the inlet side, watching your progress, hopefully you get the issue sorted out soon.

[jbertino]

So your thinking it's anywhere from right before the intercooler to throttle body?

[marcvtec]

something is off
negative boost should be -21-22

[Dmacc]

Another thought, when is the last time you replaced the boost solenoids? If never, how many miles on them?

[jbertino]

Originally Posted by Dmacc

Another thought, when is the last time you replaced the boost solenoids? If never, how many miles on them?

50k miles never changed

[amr_e90]

Check the tube coming from the air pump next to the oil filter . There are two nipples on that tube that have vacuum lines going to the solenoids I believe .

[Beemzilla]

Originally Posted by Dmacc

Another thought, when is the last time you replaced the boost solenoids? If never, how many miles on them?

From a maintenance perspective, is it wise to change/service our boost solenoids?

[vitan]

Originally Posted by MM Performance

18" hg is about normal for a fully warmed up car (out of cold start mode).

Is there more vac at "cold start mode"? My car begin to throw low boost codes after warm up...

[MM Performance]

Originally Posted by vitan

Is there more vac at "cold start mode"? My car begin to throw low boost codes after warm up...

Yes in the mid 20s on cold start

[Dmacc]

Originally Posted by Beamzilla

From a maintenance perspective, is it wise to change/service our boost solenoids?

I would swap them if you never have, there were several different part numbers for them, mine started to buzz and eventually went bad, causing vacuum/boost issues