The ETM was from an identical model so it shouldn't need to be aligned like a new one would. The alignment is required for new since the same throttle is used in multiple applications. It's definitely installed correctly and the gasket is fine.

I pulled the MAF while the car was running and it died ...

I'm a noob to Volvos but not complicated cars. My primary experience is with BMWs. I did a search but I'm not finding anything specific. I'm trying to help out my neighbor with his '99 S80 2.9.

Initially he was experiencing surging and stumbling which I immediately flagged as a potential ETM ...