996 MKI C2, rpm surges and choked itself. Secondary air pump not running.

[mhariush]

I have been getting two intermittent errors P0446 and P0102 that didn't seem to cause any issues. They popped up yesterday, and I cleared the codes with a code reader.

Today, the car just died on me. Had a tough time starting it, but got it started. Then it died again, but I think it choked. The car surges and searches when the clutch is let go after using the gas pedal. Rpms drop down to the hundreds.

I also noticed, that the secondary air pump that has usually been very loud as it runs after start, doesn't run. I don't know when this stopped, but must have been today or yesterday.

Any thoughts? Are these issues related?