N54 Boost Solenoid/Pressure Converter

This was a part of my other thread about a misfire issue but since it was impossible for me to find any info on this I figured I'd post up what I found so now we can all know for sure.

The background: Had misfire issues, after replacing plugs, injector, and coil, eventually found a PES Tuning piggyback wired to the car. I removed it but couldn't figure out what to do with the 2 vacuum lines that were tapped from the boost solenoid to the PES box. I ordered 2 new ones and here's what I found.

Here's the new solenoid with the 2 nipples and the hood covering the 3rd nipple that was used to run lines to the PES


Here it is with the cover off. Had no idea a) there was a cover to the piece at all and b) there would be a diaphragm under there.



Here's a couple extra pics I snapped




So in order to install the PES box you had to break that diaphragm piece and the cover off and expose the vacuum nipple under it. I'm not sure if you can put that stuff back on once its removed and I'm not about to break my new ones to try and find out. If anyone else is ever looking for info on a PES uninstall here you go. Buy 2 new pressure converters.

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