996TT Overboost

[OscarAH1W]

Transitioning from previous thread to new one--  Replaced the water pump and performed the 60,000 mile service in my 04 Turbo Cab.  Car runs great except now I am getting overboost to 1.0-1.3 bar.  I don't hold it there to be sure.  That said, I realize it is likely a vacuum issue but the only lines I touched during the repair are the one from the Y-Pipe to the switch and the one from the switch to the plastic line that goes to the driver side of the engine.  Flashlight and inspection mirror show the 3rd line on the underside of the switch to be connected.  Any thoughts on where else to look?

 

Thanks

 

Owen

[wross996TT]

I didn't follow the other thread, but have you checked waste gates or N75 valve?

[OscarAH1W]

I'll look again but the lines to the wastegate controllers weren't touched.  All I did was pull the muffler and cats off, replacing the studs, nuts and seals when I put it back together.  Which one is the N75 valve?

 

Thanks

[OscarAH1W]

Statman-  Thanks.  It was the one on the bottom of the N75 valve.  total pain putting the Y-pipe back together and ensuring none of the lines comes off the valve as it all goes in...

[wross996TT]

Glad you got it sorted.