I am posting this on behalf of a friend who would like feedback. He owns a 2014 Turbo S Cab with 29000 kms on it which he bought brand new.

The two times he has taken it to track he has lost his turbo boost completely within the first hour or within half hour the second time around.

After the first track incident it was diagnosed that a hose had come loose which was replaced under warranty. A few days later he lost boost again while pushing his car on a twisty mountain road. At that point his service advisor hinted that they may need to order a hose with modified fittings from Germany. But it turned out that this time it was a different hose so that was replaced under warranty and problem solved.

Today (his second time on track with it) there was a large pop or bang sound from the engine within 15 minutes of driving and he has lost boost again. This is yet to be diagnosed when he goes to dealer

Other than above incidents he has had a relatively trouble free 29000 kms of street driving. It is his DD.

He would like to know if others have had similar problems ? Is this a known issue with the 991 turbos?

 

Sounds like it could be a boost leak. Has you friend had his Diverter valves checked. The stock ones are not super strong which is why when I went GIAC stage 2 I replaced them with Champion race diverter valves.

 

Sounds like his car was built on a Friday..

The loud pop and no boost is prob right at the throttle body. He should check the coupler there and tighten if needed

 

If the car is stock I would say look into the throttle body, their is a campaign from Porsche in regards to the throttle body. If the car has mods, I would still have the dealer check the throttle body, but also check the diverter valves as stated above.

 

I should have mentioned the car is bone stock. Thanks for the feedback.

 

The Porsche campaign fixed the problem for me.

 

Anyone know which campaign this is referring to. I'm having the same problem.

 

Did this affect the 991.2?

 

Not that I know of yet. It seems to be earlier cars.

 

Only early cars. Porsche came up with a few fixes.