Any delayed shutdown when key is turned off? Sounds like your leak is at the SOV. Check up under the SOV with a mirror and light.

Resolve the air first.

K40 relay can also cause shutdown. With hood up and window open you should easily hear the SOV "click" open when the key hit pos #2. No click, no start.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)