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I have a 97 Deville that I just did an engine transplant on. It ran great afterwords for about 200 mi. until I did a WOT accel and the engine shut off with a message .. theft system problem car may not re-start. It dosen''t. Have checked all fuses and tried the 30 min learn with no luck. It also has no serial communication now. Tried swapping PCM, still no start and no commonication with any modules. Waz up?

Optional Information:
1997 Cadillac DeVille 4.6L North

Already Tried:
Check fuses, PCM swap, learn "Pass Key"

Customer (name blocked for privacy)

Status: Closed Value: $9

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