Turbo not boosting all the time

[Guest]

Hey Guys, Looking into why it seems like my secondary turbo doesnt always kick in. Sometimes you drive it and ya get the kick in the guts like you would expect and then later on take it for another drive and it doesnt seem like its boosting at all. Anyway looking over vacuum lines and noticed this. 1 vacuum hose is missing of this bottom bit on the BBoD and another one has a screw in it... Is this the norm?

[vorigan]

if the primary doesnt do its thing the secondary wont kick in itchy bum can cast his wealth on this one if you ask him nicely

[telemekas]

 jaseandjess said:

Hey Guys, Looking into why it seems like my secondary turbo doesnt always kick in. Sometimes you drive it and ya get the kick in the guts like you would expect and then later on take it for another drive and it doesnt seem like its boosting at all. Anyway looking over vacuum lines and noticed this. 1 vacuum hose is missing of this bottom bit on the BBoD and another one has a screw in it... Is this the norm?

On the last revision TT the solenoid port No:11 is not used.

The one next to it No:12 goes directly to the manifold

The bunged port comming off No:12 was for measuring manifold pressure ie boost gauge

With the accumulation of dust and oil in the vac lines and actuators over time they become less sensitive/responsive.

Time to service/clean the solenoid box.

[Guest]

Well primary seems to be kicking in nicely can feel it but sometimes 2nds will boost or othertimes it just feels like its the same power without the boost....

So telemekas where do I take the car to get the solenoid box cleaned and do you know what cost it could be? Also could this be the reason the 2nd turbo isnt always kicking in?

[Guest]

Also can I hook a boost gauge directly to this port thats been bunged? That would be easy im guessing I get a vacuum one.

[telemekas]

 jaseandjess said:

Also can I hook a boost gauge directly to this port thats been bunged? That would be easy im guessing I get a vacuum one.

Yes.

[Guest]

Awesome. Thank God for helpful people like you! Learning something everyday. Appreciate your help.

[vorigan]

 jaseandjess said:

Awesome. Thank God for helpful people like you! Learning something everyday. Appreciate your help.

i think others have been helpful in directing you and in other threads.

[Guest]

Oh yeah I know I'm not saying only him I just said people like him. This forum is awesome. Thanks to all helping me

[telemekas]

 jaseandjess said:

Well primary seems to be kicking in nicely can feel it but sometimes 2nds will boost or othertimes it just feels like its the same power without the boost....

So telemekas where do I take the car to get the solenoid box cleaned and do you know what cost it could be? Also could this be the reason the 2nd turbo isnt always kicking in?

Connect the two green plugs under the dash and turn the ignition on. This will activate (check and quick clean) the solenoids and fans.

Run for one minute (Appprox 60 secs the vacuum storage tank will discharge.This will recharge when you start the car)

Do this several times and see if it makes a difference.

[Guest]

Ok awesome will do. Do I start the car every time I do it or just do several times then start car

[telemekas]

 jaseandjess said:

Ok awesome will do. Do I start the car every time I do it or just do several times then start car

No need to start the car, just have ignition on. Run for 60 secs (you will hear the clicking and fans cutting in and out). Ignition off and unplug green connectors.

Restart car to charge the vacuum tank. Repeat above.

[Guest]

Awesome done it 5 times. Will see how she goes. Taking it for run now. Will report back

[Guest]

On the road at moment and seems be plenty of power. There isn't as much.as a huge kick in pants when 2nd Turbo kick in.... it just seems like she just starts shooting along road. That sounds about right I'm guessing

[telemekas]

OK.

For tesing only: unplug the vacuum hose that goes to the top of the very large ECV actuator. Plug the hose leave the actuator port open.

Go for a drive and note any difference.

[Guest]

Ecv actuator I will need a pic haha.

[telemekas]

 jaseandjess said:

Ecv actuator I will need a pic haha.

It is in your pic.

Follow hose No:5 (the one below No:3 in pic) from the solenoid box.

[Guest]

Right done. Seems the same to me

Did a quick 0 to 100 runand it was about 7 seconds and that was a petty bad launch too. Will buy a boost gauge today and hook up to that line

[Guest]

Secondary definitely not.boosting hard today just felt like it was no kick in when secondary should have opened

[Guest]

Right so maybe its me...... Put boost gauge on and 10ish psi on primary and 14-15psi on secondary so must be fine. Will keep an eye on it but now I dont have to guess anymore!