TDI Starts, then dies!

2002 TDI with 116K miles on it. Ran fine when i parked it. 3 Days later when i tried to start it, it fired right up, ran for 1-3 seconds, then died. Does this repeatedly.
Immobilizer Key is NOT flashing, but it acts just like the immobilizer is activated! Any ideas?

Is your anti-shudder valve stuck?

I had that problem was the key itself the chip in the key was messed up somehow ordered a new blade and no problems since

Sounds like immobilizer problem