[denial512]

So I've read various threads about folks having wastegate sticking, causing low boost.
I checked mine, and the wastegate lever fully closes normally.
Moving it back and forth, it is smooth, and needs a lot of hand pressure to move against it.

Reason I'm looking at this is because I feel I have issues with boost not holding.

In sport mode, 2nd or 3rd gear pulls, full throttle, boost pressure builds to 18psi, but then immediate drops down to ~13psi.
Should it hold 18-21psi under full throttle?

 

[Scrounger]

Sounds fine to me.

 

[marco_polo]

Is the pressure converter (control solenoid basically) healthy? Any weird fluttering noises from the air intake when you turn the engine off?

 

[marco_polo]

718 (982) Turbocharger pressure converter failure

Turbocharger pressure converter / Turbo boost solenoid valve failed, a loud noise coming from the air intake compartment when you shut down the engine. Many of the owners are having the same issue in our country. I got mine replaced in Porsche workshop for free.

www.718forum.com

 

[johan]

Is it base, S or GTS ?

 

[RobertM]

So I've read various threads about folks having wastegate sticking, causing low boost.
I checked mine, and the wastegate lever fully closes normally.
Moving it back and forth, it is smooth, and needs a lot of hand pressure to move against it.

Reason I'm looking at this is because I feel I have issues with boost not holding.

In sport mode, 2nd or 3rd gear pulls, full throttle, boost pressure builds to 18psi, but then immediate drops down to ~13psi.
Should it hold 18-21psi under full throttle?

Is it dropping to 13psi during the shift? That would be normal.

 

[denial512]

Is it base, S or GTS ?

Base

Is it dropping to 13psi during the shift? That would be normal.

During WOT.

Is the pressure converter (control solenoid basically) healthy? Any weird fluttering noises from the air intake when you turn the engine off?

I need to verify. I actually think this may potentially be the issue. Thanks!

 

[Payman]

I’ve kinda wondered this too and never really saw the answer given… I build boost up to 18-20 psi and then it drops quickly, sometimes to 0, can’t remember if that’s during a shift or just when releasing the throttle pedal.

I do not feel a lack of boost/power ever, in any gear, so I’ve ultimately never worried.

 

[denial512]

If it is the turbocharger pressure converter (946 605 155 00), how hard is it to change out?

Found this image from another thread. Not sure the location..

 

[marco_polo]

Hugh recently had his replaced. I doubt it's a particularly tricky job once the covers are removed:

Reflections on base Cayman a month in -- not all good

Fun start to my Saturday. Still have not heard back from Porsche but called the warranty company and they denied the claim. I was a little shocked as I assumed that anything related to the turbocharger (when the warranty clearly states that the turbocharger is covered) would be covered...

www.718forum.com

 

[denial512]

Looking at pulled motors on ebay, looks like this boost pressure control valve is at the top, drivers side.
Perhaps accessible with the top panel removed, and the air box removed?

 

[dekilla]

The hole work can be done in 2-3h if you never done it before.
I changed that 2 times on my 2.0l Boxster. Porsche has upgrated the valve in early 2022. There is a new version with a new part number - i don´t know.
Once you got the roof in service position all other work is easy. To get the metal cover out without damaging the trunk cover is another strory.

The valve sits under the air filter Box. But to remove the air filter housing is the trick. It has no screws just clicked in with plastic gormets. You have to give it a hard pull with an anoying sound when it comes lose.
Than you can access the valve.

 

[Sebounet]

I have a boxster Base 2021. On the boost pressure when i accelerate it reaches a high number (maximum) but after reaching a certain RPM it decrease a litlle. I thought it was normal ? It is not ?. And i have a strange noise that some people think it is a waste gate issue , the video is here 15 octobre 2022

 

[denial512]

The hole work can be done in 2-3h if you never done it before.
I changed that 2 times on my 2.0l Boxster. Porsche has upgrated the valve in early 2022. There is a new version with a new part number - i don´t know.
Once you got the roof in service position all other work is easy. To get the metal cover out without damaging the trunk cover is another strory.

The valve sits under the air filter Box. But to remove the air filter housing is the trick. It has no screws just clicked in with plastic gormets. You have to give it a hard pull with an anoying sound when it comes lose.
Than you can access the valve.

Don't happen to have the new part number, do you? Also, where did you source this part?

Thanks!

 

[dekilla]

Nah, just have the old one.
Bought the valves by a googled part shop, i took the cheapest one.
Runs 1 1/2 years than it wants to be changed again. This is why i took 2 valves, to have one in spare.