Mystery Problem, Limited RPMs

[virgosunleomoon]

grabbed a fuel pump relay from a 1999 996 (same part) and the car is doing the exact same thing. Car starts (a little rough) and stays at 1000 RPMs and applying the gas pedal only gets you up to 1100 RPMs and it comes back down to 1075 RPM and stays there.

I ordered Porsche specialty tool 9559 so I can check the fuel pressure. My cheap Harbor freight fuel pump gauge and adapters don't fit on this schrader valve.

[BYprodriver]

Sounds like your drive-by-wire is not working properly. If you look above the gas pedal under the dash you will see the actual "sensor" that tells the DME how much throttle is required by the driver. I have read online about people disassembling this part to clean it & make it function again. You might try vacuming it 1st before disassembly. Search internet for more info. I've never done this personally.

[Paul]

Since you were working on the AOS, any chance you loosened or damaged the connector or wiring for the throttle motor?