I did find this little article here:
https://www.armstrongfamilyblog.com/...relation-p0018
mentioning having to replace the ECU after certain cam sprocket repairs, but we all know that these ECU's can be reflashed to an updated cal ID so that would save you from having to buy a new ECU. The only thing with this article is that it doesn't mention the problem of not starting or running, only running poorly and idling rough.