I highly doubt it's the immobilizer. I would think that with an immobilizer problem you would be stalling while you were in flight, not just at a stop.Reducs said:If yours is stock, I wouldn't think that it would be running lean.
I'm with reducs on the lean issue. Mine has stalled on me a few times at a stop, but mostly when I just fired it up and taken off. I would have them check the mixture first, sound less painful and intrusive than a immobilizer switch.