Troubleshoot Jag engine stalling

The air supply tube from the left side valve cover going to the throttle body will supply air during the closed throttle body condition.

This tube and the port will get plugged with PCV gunk, and block the air flow, thus the engine will stall.

1) Pull the tube off, and clean.
2) Clean the Air port in the valve cover with a 3/32 in. drill bit, or a tooth pic.

Caution - Don't drop in the valve cover.